Black 12mm Heat Shrink 3:1 | 15 cm x 4 Pcs.

This Black 12mm Heat Shrink 3:1 set offers a practical and reliable solution for insulating and protecting electrical connections in a variety of projects. Supplied as four individual 15 cm lengths, this tubing is ideal for use in automotive wiring, audio system installations, home electronics repairs, and DIY battery pack assembly. Its generous 12 mm diameter before shrinking makes it well-suited for covering larger connectors, terminals, and splices where standard tubing would not fit.

The key technical advantage of this heat shrink is its 3:1 shrink ratio, meaning it contracts to one-third of its original diameter when heated, ensuring a tight, secure fit over irregular shapes and multiple wires. This provides excellent electrical insulation and mechanical protection against abrasion, moisture, and minor chemical exposure. The tubing is made from flexible polyolefin material that conforms smoothly to the underlying components, and it shrinks evenly when exposed to heat from a hot air gun or similar source. The black colour offers a neat, professional finish that blends well in most environments.

Whether you are a professional technician or a hobbyist, this heat shrink tubing delivers dependable performance for creating durable, insulated connections. Its convenient pre-cut lengths save time and reduce waste, making it a practical addition to any toolkit.