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

Product ID: 344555033

Details

Brand
MGI SpeedWare
Color
Black
Material
Polyester
Style
Braided
Product Dimensions
120"L x 0.5"W

🔥Heat-resistant up to 150°C

🧵Durable braided PET polyester

🛠️Split design for easy wrap & install

€ 44.64

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔥 Wrap your wires in next-level heatproof style!

PREMIUM DURABILITY - Braided PET polyester resists cuts, abrasion, and wear for long-lasting cable management.
GENEROUS LENGTH FIT - 10 feet of 1/2" sleeving covers multiple projects, perfect for automotive and home use.
ULTIMATE HEAT DEFENSE - Withstands scorching temps up to 150°C (302°F) to protect your cables under pressure.
EFFORTLESS INSTALLATION - Split-sleeve design with 25% overlap wraps wires in seconds, no hassle.
SLEEK PROFESSIONAL FINISH - Transforms messy wires into clean, organized harnesses that impress.

The MGI SpeedWare Braided Split-Sleeve Wire Loom offers 10 feet of durable, heat-resistant (up to 150°C) polyester sleeving with a smart split design for quick installation. Ideal for automotive harnesses and home cable management, it provides professional-grade protection and organization, backed by a 4.8-star rating from over 1,000 users.

Specifications

ASIN	B08ZSC39C6
Best Sellers Rank	#5,624 in Electronics ( See Top 100 in Electronics ) #38 in Cable Sleeves
Brand	MGI SpeedWare
Color	Black
Customer Reviews	4.8 out of 5 stars 1,058 Reviews
Enclosure Material	Polyester
Installation Type	Self-Adhesive
Item Dimensions L x W	120"L x 0.5"W
Manufacturer	MGI
Material	Polyester
Mfr Part Number	Cavalrywolf
Number of Pieces	1
Product Dimensions	120"L x 0.5"W
Style	Braided
Style Name	Braided
Unit Count	10 Feet
Warranty Description	Warranty covers defects in materials and workmanship under ordinary use for one year

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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TrustScore 4.5 | 7,300+ reviews

Fatima A.

Best international shipping I've ever tried. Worth every penny!

3 days ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

2 weeks ago

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€ 44.64

Duties & taxes included

In stock

Sold byAmazon SlovakiaDelivered 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 Slovakia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

Customer service was outstanding when I had questions about the product.

2 days ago

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The customer service exceeded my expectations. Perfect for buying products you can't find elsewhere.

1 week ago

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