Black Heat Shrink Tubing Set 3mm 4mm 5mm 6mm – 4×1m PE

4-Size Black Heat Shrink Tubing Assortment – 4 × 1 Metre Lengths

Get exactly the sizes you need in one handy pack. This PE heat shrink tubing assortment includes four individual 1-metre lengths in the most commonly used diameters — 3mm, 4mm, 5mm, and 6mm — all in classic black. Whether you're tidying up wire splices, insulating solder joints, colour-coding cables, or protecting bare connections, this multi-size set keeps your workbench ready for any job.

What's in the Pack?

• 1 × 1 m length — 3mm diameter heat shrink
• 1 × 1 m length — 4mm diameter heat shrink
• 1 × 1 m length — 5mm diameter heat shrink
• 1 × 1 m length — 6mm diameter heat shrink

Key Features

• Material: Durable polyethylene (PE) — flexible and resistant to moisture, dust, and abrasion
• Colour: Black — professional finish, ideal for most wiring applications
• Shrink ratio: Standard 2:1 — shrinks snugly around the conductor when heated
• Four diameters in one pack — 3mm, 4mm, 5mm, 6mm to suit a wide range of wire gauges
• Easy to use — apply a heat gun or lighter briefly and watch it conform tightly to the wire
• Versatile — suitable for automotive wiring, DIY electronics, home repairs, hobby projects and more

Typical Uses

• Insulating and protecting soldered wire joints
• Bundling and organising cable runs
• Colour-coding wire harnesses
• Repairing frayed cable insulation
• Automotive and marine wiring projects
• Hobbyist RC, electronics, and maker projects

Made in Mainland China.

For more wiring and electrical project essentials, explore our related products:
— Looking for tools to go with your wiring projects? Check out our DIY & Maker workshop accessories.

Learn More

For best practices on safe wiring and electrical insulation in DIY projects, visit the U.S. Consumer Product Safety Commission – Electrical Safety resource.

Learn more: Heat-shrink tubing

Frequently Asked Questions

Q: What shrink ratio does this heat shrink tubing have?

A: This PE heat shrink tubing has a standard 2:1 shrink ratio, meaning it shrinks to approximately half its original diameter when heat is applied. This ensures a snug, secure fit around most common wire gauges within the 3mm–6mm size range.

Q: What tool do I use to shrink the tubing?

A: A standard heat gun is the most recommended tool for even, controlled shrinking. In a pinch, a lighter or match can be used carefully — keep the flame moving to avoid scorching the tubing. Avoid direct sustained flame contact.

Q: Are all four sizes included in one purchase?

A: Yes! Each pack contains four separate 1-metre lengths — one each of 3mm, 4mm, 5mm, and 6mm black PE heat shrink tubing — giving you a total of 4 metres across the four diameters.

Q: Can this heat shrink tubing be used in automotive wiring?

A: Absolutely. PE heat shrink tubing is widely used in automotive, marine, and general electrical applications to insulate connections, protect against moisture and abrasion, and create clean, professional-looking wiring harnesses.