Unique-Bargains
Unique-Bargains 3:1 Heat Shrink Tubing 3 mm 5 m Black
3 mm diameter heat-shrink tubing with a 3:1 shrink ratio, 5 m length, 1000 V rating and -40 °C to 125 °C operating range
- 3:1 shrink ratio fits snugly over 3 mm wires
- Continuous 5 m length covers multiple cable runs
- 40 °C to 125 °C range withstands harsh environments
- 1000 V rating insulates mains-voltage circuits safely
- Waterproof, corrosion-resistant sleeve protects wiring long-term
3 mm Heat-Shrink Tubing for Electrical Work
This 3:1 ratio tubing shrinks from a 3 mm diameter to protect and insulate wires. Supplied as a 5 m length, it suits electricians, hobbyists and automotive technicians who need reliable cable sleeving. The 1000 V rating covers most low-voltage and mains-rated insulation tasks. Black colour allows simple colour-coding or discreet repairs.
Thermal Performance and Power Characteristics
Rated for continuous operation from -40 °C to 125 °C (-40 °F to 257 °F), the tubing retains flexibility and dielectric strength across extreme temperatures. It adds no electrical load, draws no power and produces no noise during normal use. High-temperature resistance prevents degradation near hot components or in engine bays.
Included Length and Practical Benefits
The single 5 m (16 ft) piece lets you cut custom lengths for wire bundling, strain relief or waterproof sealing. Corrosion resistance and high-strength toughness extend service life in damp or abrasive environments. Good electrical insulation and waterproof performance protect connections without additional sealants or tapes.
Highlights
- 3:1 shrink ratio fits snugly over 3 mm wires
- Continuous 5 m length covers multiple cable runs
- 40 °C to 125 °C range withstands harsh environments
- 1000 V rating insulates mains-voltage circuits safely
- Waterproof, corrosion-resistant sleeve protects wiring long-term
Specifications
| Brand | Unique Bargains |
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Questions about this item
How do I install the 3 mm heat-shrink tubing and what step is often missed?
Slide the tubing over the wire before making connections, apply heat evenly until it shrinks to the 3:1 ratio, and let it cool completely before handling.
Will the tubing need replacement if used continuously at high temperature?
The material is rated for -40 to +125 °C and resists corrosion and water, so it should not need replacement within that range.
What is the first limit reached when the tubing carries 1000 V under sustained load?
The 1000 V voltage rating is the primary electrical limit; exceeding it risks insulation breakdown before the temperature limit is reached.
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