Are the dimensions listed the recovered or unrecovered size?

Hi, The 4:1 shrink ratio simply means that it recovers to 1/4 of its original diameter. I hope this helps! You can contact us directly if you need more info.

Can it be used with self regulating heat cable

Hi, We do not recommend it because it will generally be kept at a higher temperature, up to 120℃, occasionally as high as 175℃.

Can this be used to cover banana plugs in use with speaker wire?

Thank you for your question. Yes, it can be used to cover banana plugs in use with speaker wire.

Can these be used to reinforce the wire leading to earbuds? The rubber has ripped exposing a small window of the wires.

You could if you are very careful as the heat needed to use for these could very easily melt the wires for your ear buds. You may be better off using liquid tape.

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🔥 Seal it tight, protect it right — the ultimate heat shrink kit for pros!

DUAL WALL DURABILITY - Outer abrasion resistance plus inner strain relief for long-lasting protection.
BUILT IN ADHESIVE SEAL - Heat-activated glue creates a durable, waterproof insulation every time.
QUICK EASY APPLICATION - Slide on, heat, and seal in seconds—perfect for pros and DIYers alike.
VERSATILE SIZE ASSORTMENT - Five commonly used diameters cover all your wiring needs with ease.
PRECISION 4 1 SHRINK RATIO - Ensures a snug, professional-grade fit that outperforms standard tubing.

The Wirefy Heat Shrink Tubing Kit offers 190 pieces of premium polyolefin tubing with a superior 4:1 shrink ratio and adhesive-lined dual walls. Designed for professional and DIY electrical insulation, it provides waterproof, abrasion-resistant protection across five versatile sizes in black and red. UL certified and rated for 600V, this kit ensures fast, reliable, and durable wire connections every time.

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Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

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Manufacturer	Wirefy
Part Number	Wirefy-DW41-190-B-R
Item Weight	9.5 ounces
Product Dimensions	7.68 x 5.12 x 1.38 inches
Item model number	Wirefy-DW41-190-B-R
Size	Length: 1.75"
Color	Black
Style	190 PCS - Black, Red
Material	Polyolefin
Voltage	600 Volts (AC)
Item Package Quantity	190
Certification	Ul
Batteries Included?	No
Batteries Required?	No

Wirefy Heat Shrink Tubing Kit 190 PCS - 4:1 Ratio Adhesive Lined - Adhesive Heat Shrink with Glue - Black & Red - Heat Shrink Tube Kit, Heat Shrink Assortment, Waterproof Heat Shrink Tubing

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