---
product_id: 420092688
title: "WRS Series 37 QuickTilt Coil Spring Window Balance – #5 Left Hand (9–10.99 lbs, Single Coil) – Constant Force Design with Pre-Assembled Pivot Shoe for Tilt Windows – Balance Support Window Hardware"
price: "B/.44"
currency: PAB
in_stock: true
reviews_count: 9
url: https://www.desertcart.com.pa/products/420092688-wrs-series-37-quicktilt-coil-spring-window-balance-5-left
store_origin: PA
region: Panama
---

# Constant-force coil spring tech Pre-assembled pivot shoe 9–10.99 lbs precise support WRS Series 37 QuickTilt Coil Spring Window Balance – #5 Left Hand (9–10.99 lbs, Single Coil) – Constant Force Design with Pre-Assembled Pivot Shoe for Tilt Windows – Balance Support Window Hardware

**Price:** B/.44
**Availability:** ✅ In Stock

## Summary

> 🪟 Elevate your window game with effortless tilt & timeless durability!

## Quick Answers

- **What is this?** WRS Series 37 QuickTilt Coil Spring Window Balance – #5 Left Hand (9–10.99 lbs, Single Coil) – Constant Force Design with Pre-Assembled Pivot Shoe for Tilt Windows – Balance Support Window Hardware
- **How much does it cost?** B/.44 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/420092688-wrs-series-37-quicktilt-coil-spring-window-balance-5-left)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Galvanized steel with AAMA Class 3 corrosion resistance ensures durability through thousands of cycles.
- • **DIY-Ready Installation:** Pre-assembled coil and pivot shoe make upgrades or repairs fast and hassle-free.
- • **Precision Engineered Fit:** Compact 1-9/32″ housing and 17/32″ coil spring deliver a perfect, reliable fit every time.
- • **Effortless Window Control:** Smooth, friction-free lift for lighter sashes—no more struggling to open or close.
- • **Trusted Expertise Since 1989:** WRS’s 30+ years of innovation means you’re backed by proven quality and nationwide trust.

## Overview

The WRS Series 37 QuickTilt Coil Spring Window Balance (#5 Left Hand) supports 9–10.99 lb tilt windows with a constant-force single coil spring design. Made from corrosion-resistant galvanized steel and pre-assembled for easy installation, it ensures smooth, quiet sash operation and long-lasting performance trusted by professionals and homeowners alike.

## Description

The 37 Series is a standard coil spring window balance. This balance is designed for residential window applications. These balances feature a 17/32" coil spring in single, tandem, or triple case applications. These balance weights are evenly divided. For example, if your sash weighs 14lbs, you would need one 7lb balance on each side of your sash.

Review: good item - The item is very well made and works very well. Glad I purchased it. The spring tension is way above what was needed, the window opens "very" easy but to close it takes a little effort. Had to modify the window frame slightly to fit it into the frame, the u-tube videos makes it look easy but it takes more time to do it.
Review: Fits perfectly, easy to install - This is friggin' awesome! We had been using a stick for ages to keep our bathroom window open after it would no longer stay open on its own. Never realized that you could buy these window balance kits on desertcart to fix it. Fits perfectly, dead-easy to install—and I'm not exactly Mr. Handiman. Highly, highly recommended!

## Features

- LIGHTWEIGHT SINGLE-COIL DESIGN: Engineered for tilt-style single-hung and double-hung windows, the WRS Series 37 QuickTilt Single Coil delivers precise counterbalance and smooth sash control for lighter sashes. This product features a #5 Left Hand coil rating and supports 9–10.99 lb sashes. The compact constant-force coil delivers quiet, friction-free lift—ideal for standard residential windows requiring dependable, effortless operation. Right-hand balance sold separately.
- CONSTANT FORCE SPRING TECHNOLOGY: This coil spring balance uses a constant-force mechanism that maintains steady tension throughout sash travel—no pulleys or cords to wear out. The result is smooth, consistent window operation and extended component lifespan.
- DURABLE AAMA CLASS 3 QUALITY: Built from galvanized steel for corrosion resistance and long-term strength, each QuickTilt balance is AAMA Class 3 verified and precision-tested through thousands of open-close cycles. Coil housing measures 1-9/32″ wide with a 17/32″ coil spring for a precise, reliable fit.
- PRE-ASSEMBLED FOR EASY INSTALLATION: Arrives ready to install with the coil and pivot shoe pre-assembled, fitting directly into standard tilt window tracks. Designed for DIY or professional repairs, it offers fast, accurate setup and long-term dependability.
- TRUSTED SINCE 1989: WRS Window Repair Systems has over 30 years of experience supplying reliable, high-quality hardware. Trusted nationwide by homeowners, contractors, schools, and property managers for dependable repairs and long-lasting performance.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | WRS |
| Part Number | 01-37-10 |
| Item Weight | 3.2 ounces |
| Material | Plastic |
| Item Package Quantity | 1 |
| Maximum Weight Capacity | 7 Pounds |
| Batteries Required? | No |

## Images

![WRS Series 37 QuickTilt Coil Spring Window Balance – #5 Left Hand (9–10.99 lbs, Single Coil) – Constant Force Design with Pre-Assembled Pivot Shoe for Tilt Windows – Balance Support Window Hardware - Image 1](https://m.media-amazon.com/images/I/31YgrjgVirL.jpg)
![WRS Series 37 QuickTilt Coil Spring Window Balance – #5 Left Hand (9–10.99 lbs, Single Coil) – Constant Force Design with Pre-Assembled Pivot Shoe for Tilt Windows – Balance Support Window Hardware - Image 2](https://m.media-amazon.com/images/I/21ziltU-QpL.jpg)
![WRS Series 37 QuickTilt Coil Spring Window Balance – #5 Left Hand (9–10.99 lbs, Single Coil) – Constant Force Design with Pre-Assembled Pivot Shoe for Tilt Windows – Balance Support Window Hardware - Image 3](https://m.media-amazon.com/images/I/31iTV-Us6pL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ good item
*by J***P on September 11, 2025*

The item is very well made and works very well. Glad I purchased it. The spring tension is way above what was needed, the window opens "very" easy but to close it takes a little effort. Had to modify the window frame slightly to fit it into the frame, the u-tube videos makes it look easy but it takes more time to do it.

### ⭐⭐⭐⭐⭐ Fits perfectly, easy to install
*by R***N on February 16, 2026*

This is friggin' awesome! We had been using a stick for ages to keep our bathroom window open after it would no longer stay open on its own. Never realized that you could buy these window balance kits on Amazon to fix it. Fits perfectly, dead-easy to install—and I'm not exactly Mr. Handiman. Highly, highly recommended!

### ⭐⭐⭐⭐⭐ Easy replacement part, worked eventhough what I was replacing looked nothing like this.
*by Z***. on May 16, 2025*

Worked perfectly! Wasn't sure if this would work, I could not find the original manufacturer of the window, nor the actually part that looked the same. All I did was measure the width and height of the spring I already had, weighed the mirror(to determine what strength tension I needed, 8lbs in this case) then search till I found something close. I had a few of the pieces break off while trying to put it in, was ridiculous hard to get in, and the little piece of plastic that broke off don't even matter, they were pretty much excess plastic for whatever reason. Once in the window it instantly worked flawlessly. Window can now slide up and down with one hand and stays in place. Glad this worked 👍 The photo is the piece that I needed replaced. Doesn't look similar, but worked just as good.

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**Shop now:** [https://www.desertcart.com.pa/products/420092688-wrs-series-37-quicktilt-coil-spring-window-balance-5-left](https://www.desertcart.com.pa/products/420092688-wrs-series-37-quicktilt-coil-spring-window-balance-5-left)

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*Product available on Desertcart Panama*
*Store origin: PA*
*Last updated: 2026-08-21*