Is 1/4" and 3/8" so close in actual size there is no discernable difference?

There is a difference. The 1/4” measures 3/8” od with an overlap of 1/4”. The 3/8” measures1/2” od with an overlap of about 3/4.

What is the best way to measure the wires so I can determine the correct size needed to completely wrap around my wiring harness?

For example, the 1/2" loom size will fit around a 1/2" diameter wire bundle. You'll get about 25% overlap of the material.

Will this protect cable and ethernet wires if I run it over an electric radiator?

I would say no. It is just weaved plastic strands. It protects against scuff and possibly sharp edges but not heat. If you want heat protection use exhaust heat wrap

does this help stop rats and mice from eating your wires??

Definitely makes it harder for rodents to eat through to the wires but its not a guaranteed solution. Given enough time rodents will likely eat through anything that isn't metal mesh.

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MGI SpeedWare Braided Split-Sleeve Black Wire Loom for High-Temperature Automotive Harness and Home Cable Management 10 Feet (1/2")

MGI SpeedWare Braided Split-Sleeve Black Wire Loom for High-Temperature Automotive Harness and Home Cable Management 10 Feet (1/2")

Product ID: 328173158

Details

Brand
MGI SpeedWare
Colour
Black
Material
Polyethylene
Product dimensions
3.05L x 0.01W
Style
Braided

📏10 feet length with 1/2 inch diameter

🔥Heat-resistant up to 150°C

🛡️Cut & abrasion resistant braided PET

B/.96

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Description

🖤 Wrap your wires in next-level protection and style!

DURABLE LIGHTWEIGHT - Braided PET polyester resists cuts and abrasion without bulk.
LONG LASTING COVERAGE - 10 feet of premium sleeving ensures full containment and protection.
SLEEK CABLE ORGANIZATION - Keeps automotive and home wiring neat, safe, and stylish.
EFFORTLESS WRAP PROTECT - Split-sleeve design slips on easily—no zip ties needed.
ENGINE GRADE HEAT DEFENSE - Withstands scorching temps up to 150°C for under-hood confidence.

The MGI SpeedWare Braided Split-Sleeve is a 10-foot, 1/2-inch diameter wire loom made from durable, heat-resistant braided PET polyester. Designed for easy installation with a split design, it protects automotive and home cables from heat up to 150°C and abrasion, offering a sleek, long-lasting cable management solution.

Specifications

ASIN	B08ZSC39C6
Best Sellers Rank	#81,124 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #294 in Cable Sleeves
Brand	MGI SpeedWare
Color	Black
Colour	Black
Customer Reviews	4.7 out of 5 stars 661 Reviews
Enclosure Material	Polyethylene Terephthalate
Installation Type	Slide-On
Installation type	Slide-On
Item Dimensions L x W	3.05L x 0.01W Meters
Manufacturer	MGI
Manufacturer Contact Information	[email protected]
Material	Polyethylene Terephthalate
Mfr Part Number	Cavalrywolf
Number of Packs	1
Number of Pieces	1
Product dimensions	3.05L x 0.01W Meters
Style	Braided
Style Name	Braided
Unit Count	1.0 Count

Reviews

M**E

Facile a utiliser ,fait une super jod de protection et esthétique

Super produit je le recommande pour toute protection et esthétique sous le capot ou autre endroit sur les véhicules

13.10.2024

M**.

Oooh, nice

Much easier to slide over than thin rubber.

8.01.2026

C**O

Good quality

Good quality, pretty easy to install, and many applications that it can be used on. Makes the wires look much cleaner than the old rigid corrugated style. Good value for the cost.

1.04.2026

A**R

Buy it again

Great stuff easy to use looks professional

11.06.2025

P**S

Great product

Perfect for what it is. A but tricky to get the cables in but this is a good thing, as it keeps them nice and tight. Ideal for my living room tv where i wanted something nice-looking that kept the cables in place whenever i changed the tv orientation. Cuts easily and quality is high.

26.04.2025

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B/.96

Duties & taxes included

In stock

Sold byAmazon PanamaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Panama.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Abdullah B.

Great price for an authentic product. Fast international shipping too!

3 weeks ago

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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