---
product_id: 59059637
title: "Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00)"
brand: "cooler master"
price: "B/.377"
currency: PAB
in_stock: true
reviews_count: 8
category: "Cooler Master"
url: https://www.desertcart.com.pa/products/59059637-cooler-master-masterbox-q300l-micro-atx-tower-with-magnetic-design
store_origin: PA
region: Panama
---

# Magnetic dust filters with unique pattern 240mm liquid cooler + 5 fans max Supports Micro-ATX & Mini-ITX boards Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00)

**Brand:** cooler master
**Price:** B/.377
**Availability:** ✅ In Stock

## Summary

> 🖤 Small Size, Big Performance — The Q300L Means Business

## Quick Answers

- **What is this?** Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00) by cooler master
- **How much does it cost?** B/.377 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.pa](https://www.desertcart.com.pa/products/59059637-cooler-master-masterbox-q300l-micro-atx-tower-with-magnetic-design)

## Best For

- cooler master enthusiasts

## Why This Product

- Trusted cooler master brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Clean & Distinctive:** Magnetic dust filters with a standout pattern keep your system pristine and stylish.
- • **Show Off Your Build:** Edge-to-edge transparent side panel to flaunt your meticulous rig.
- • **Compact Yet Spacious:** Fits CPU coolers up to 159mm and GPUs up to 360mm without compromise.
- • **Cool & Quiet Mastery:** Open thermal design with perforated panels ensures peak airflow and heat dissipation.
- • **Modular I/O, Your Way:** Six adjustable I/O panel positions for ultimate setup flexibility.

## Overview

The Cooler Master Q300L is a compact yet highly versatile Mini-Tower case designed for Micro-ATX and Mini-ITX builds. It features a modular I/O panel with six placement options, supports large CPU coolers and GPUs, and maximizes cooling with support for a 240mm liquid cooler and up to five fans. Its edge-to-edge transparent side panel and unique magnetic dust filters combine style with practical airflow, making it a top choice for professionals seeking a sleek, customizable, and efficient PC chassis.

## Description

The Master Box Q300L is your straightforward option in the lineup of the brand new Master Box Series from Cooler Master. A Series that might be small in size but excels in functionality and modularity without compromising on the thermal performance. Although the size wouldn't tell, the Master Box Q300L supports a standard ATX PSU which we don't see often in the market with this size. Based on the different system setup, the I/O panel can be adjusted to six different locations, three options at each side of the case. You can decide which setup fits your system best. Due to the cube design of the frame and special pattern design on the magnetic dust filter will make the chassis stand out from the rest. The combination of a practical design and the unique customizable outlook makes the Master Box Q300L The perfect choice for office and home.

Review: Good Budget friendly micro-atx case - Great value micro-atx case. Its cheap and works. Like the compact size and the fact it came with screws, spacers, ties and a fan. I like the magnetic dust filters concept however BEWARE of the very rough and pointed edges which could cut you while handling them. The power button on the side panel worked for me but could be a problem with other builds. I was barely able to fit two Thermalright TL-C14C 140mm fans in the front with the default front facing power button+LED panel layout, while managing the power/led/usb cables in between the two fans to the backpanel but it was a very tight fit. You can move the power panel to top bottom or rear if you have the space. My Thermaltake Smart 700W PSU blocked the bottom though. While the top was blocked the height and size of the Thermalright Phantom Spirit 120 SE Black CPU Cooler. And the rear was blocked by case fan and no real access for cable management through to the back panel. So I had to make the front faced orientation to work, which it did. All in all I am happy with the value of the product.
Review: I am Pleased - awesome case great airflow and space the only thing is space for hdd or ssd you will have to make it work if you want a clean looking case and i wish this case had a cover for the psu but all in all i love the case and the airflow of this case definitely worth the money very solid built

## Features

- Ample Interior: Explore ample interior space for Micro-ATX or Mini-ITX motherboards, ensuring easy and future expansion
- Components Clearance: Accommodates CPU coolers with a max height of 159mm, GPU cards up to 360mm, and PSU up to 160mm in length.
- Versatile Cooling: Maximize cooling performance with a 240mm liquid cooler and 5 fans.
- Modular I/O Panel: You have the flexibility to adjust its position at the front, top, or bottom on both sides
- Edge-To-Edge Panel: Show off your meticulous build through the transparent side panel with pride.
- Open Thermal Design: The perforated design on all sides promotes optimal airflow and heat dissipation
- Magnetic Dust Filters: The unique pattern of the dust filter adds a distinctive appearance to the case.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0785GRMPG |
| Antenna Location | Gaming |
| Best Sellers Rank | #2 in Computer Cases |
| Brand | Cooler Master |
| Built-In Media | 1 computer case |
| Case Type | Mini-Tower |
| Color | Black |
| Compatible Devices | Micro-ATX and Mini-ITX motherboards, Cooler Master devices |
| Cooling Method | Air |
| Customer Reviews | 4.5 out of 5 stars 13,734 Reviews |
| Enclosure Material | Alloy Steel, Plastic |
| Global Trade Identification Number | 00884102038006, 00884102095313, 04719512065488 |
| Hard Disk Form Factor | 3.5 Inches |
| Internal Bays Quantity | 1 |
| Item Dimensions D x W x H | 15.39"D x 9.06"W x 15"H |
| Item Height | 15 inches |
| Item Type Name | grocery |
| Item Weight | 480 Grams |
| Manufacturer | Cooler Master |
| Material | Alloy Steel, Plastic |
| Model Name | Q300L |
| Motherboard Compatability | Micro-ATX and Mini-ITX |
| Number of Fans | 3 |
| Other Special Features of the Product | Accomodates CPU Coolers, Adjustable, Dust Filter, Edge-To-Edge Panel, Fully Ventilated |
| Power Supply Maximum Output | 500 Watts |
| Power Supply Mounting Type | Bottom Mount |
| Recommended Uses For Product | Gaming |
| Supported Motherboard | Micro-ATX and Mini-ITX |
| Total Expansion Slots Quantity | 4 |
| Total USB 3.0 Ports | 2 |
| Total Usb Ports | 2 |
| UPC | 884102095313 884102038006 |
| Warranty Description | 2 |

## Product Details

- **Brand:** Cooler Master
- **Case Type:** Mini-Tower
- **Color:** Black
- **Cooling Method:** Air
- **Item Weight:** 480 Grams
- **Material:** Alloy Steel, Plastic
- **Model Name:** Q300L
- **Motherboard Compatability:** Micro-ATX and Mini-ITX
- **Power Supply Mounting Type:** Bottom Mount
- **Recommended Uses For Product:** Gaming

## Images

![Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00) - Image 1](https://m.media-amazon.com/images/I/81I9Ef0fOIL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Is this case wide enough to support a cooler master hyper 212 evo?**
A: I know what the official CM specs are, but I think it will fit.  This guy installed a taller cooler with its cover and it fit.  https://www.vortez.net/articles_pages/cooler_master_masterbox_q300l_review,8.html

**Q: I've seen photos of the handle (from a Q300P) being attached to the center of the top panel of this case. Is this possible?**
A: You can remove the plastic bit that has the cooler master logo on it and install handles on the case like the Q300P

**Q: what are the size and placements of the fans?**
A: There are 3 fans (120mm) in total. 1 exhaust fan in the rear, and 2 intake fans at the front.

-CM Myke

**Q: Does the case come pre-assembled?**
A: Hello Kevin,

The case does come assembled, but you will need to plug in the connectors, and open it up to install your components.

CM-PNguyen

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good Budget friendly micro-atx case
*by M***T on November 17, 2025*

Great value micro-atx case. Its cheap and works. Like the compact size and the fact it came with screws, spacers, ties and a fan. I like the magnetic dust filters concept however BEWARE of the very rough and pointed edges which could cut you while handling them. The power button on the side panel worked for me but could be a problem with other builds. I was barely able to fit two Thermalright TL-C14C 140mm fans in the front with the default front facing power button+LED panel layout, while managing the power/led/usb cables in between the two fans to the backpanel but it was a very tight fit. You can move the power panel to top bottom or rear if you have the space. My Thermaltake Smart 700W PSU blocked the bottom though. While the top was blocked the height and size of the Thermalright Phantom Spirit 120 SE Black CPU Cooler. And the rear was blocked by case fan and no real access for cable management through to the back panel. So I had to make the front faced orientation to work, which it did. All in all I am happy with the value of the product.

### ⭐⭐⭐⭐⭐ I am Pleased
*by K***S on December 29, 2025*

awesome case great airflow and space the only thing is space for hdd or ssd you will have to make it work if you want a clean looking case and i wish this case had a cover for the psu but all in all i love the case and the airflow of this case definitely worth the money very solid built

### ⭐⭐⭐⭐ Pretty Good
*by I***L on November 28, 2023*

I was looking for a small mATX case to use with some older parts that I had in storage (I will list all the parts at the end for reference). So far it's worked great and I didn't really run into any major issues. I like how compact the case is and I was able to fit it under a small table. The computer is for light gaming and web browsing, so thermals have not been bad. Putting all the components together in the case was pretty straight forward. I found it a lot easier to work with than a small ITX or even a full ATX build. I didn't install any fancy or exotic parts (AIO/Water Cooling) and kept it simple, which I feel helped a lot. I like the dust filters that come with the case and the design on the filters give it a nice look. Since I am using a simple CPU (9400F), fan noise is non-existent since the processor doesn't generate a lot of heat. I'm using some Corsair RGB fans (x2 in front panel/x2 top of case), which look great and have them configured to silent in iCUE. There are a few issues so far with the case: 1) Stock outtake fan stops spinning randomly. I have it connected to the motherboard and have set the fan to full speed, but it does not fix the issue. I've also tried other fan headers on the board, but the fan continues to stop spinning. Not a big deal since a basic case fan is inexpensive, so I will be replacing it. 2) The Plexiglass can scratch easily if your not careful. I debated taking off the plastic film for this reason, but decided to remove it in the end. Glass would have been better, but for the price, you really can't complain. 3) Expansion slot covers are attached to the case, so removing them can be a little tricky. I ended up bending one of the slots a little bit, but was able to fix it by bending it back into place carefully. Finally, the only other thing that would have been nice is to have an all-in-one front panel connector. This would definitely help inexperienced builders to easily connect the front panel ports/power to the board without much struggle. Overall I'm happy with the case and do recommend it for anyone looking for an inexpensive mATX build that will look great. PC Specs: AsRock B365M Pro 4 Motherboard i5 9400F 8GB TeamGroup RAM 2133Mhz (two modules) RX 570 4GB TeamGroup SSD EVGA 650W Power Supply ATX (non-modular) ID Cooling Low-Profile CPU Fan (IS-47-XT) x4 Corsair SP120 RGB Fans with Commander Core

## Frequently Bought Together

- Cooler Master MasterBox Q300L Micro-ATX Tower with Magnetic Design Dust Filter, Transparent Acrylic Side Panel, Adjustable I/O & Fully Ventilated Airflow, Black (MCB-Q300L-KANN-S00)
- AMD Ryzen 5 5500 6-Core, 12-Thread Unlocked Desktop Processor with Wraith Stealth Cooler
- Thermaltake Smart 500W 80+ White Certified PSU, Continuous Power with 120mm Ultra Quiet Cooling Fan, ATX 12V V2.3/EPS 12V Active PFC Power Supply PS-SPD-0500NPCWUS-W

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-01-30*