Heat Shrink Tubing Kit — 127/164/328/530 Pcs Assortment with Cable Sleeve Wrap

Measure the outer diameter of the wire or connector you need to cover. Choose a tubing size whose expanded (pre-shrink) inner diameter is slightly larger than that measurement. After shrinking, the tubing typically reduces to about half its original diameter (2:1 ratio). For example, a 4mm tube generally shrinks down to approximately 2mm (≈5/32" shrinking to ≈3/32"). When in doubt, size up slightly — you can always apply more heat, but you can't un-shrink tubing.

These heat shrink tubes generally feature a 2:1 shrink ratio, meaning they shrink to approximately half their original inner diameter when heat is applied. This is the industry-standard ratio suitable for most wire splicing, terminal insulation, and cable management applications.

Polyolefin tubing typically offers good resistance to moisture, mild UV exposure, and common chemicals, making it generally suitable for outdoor and automotive use. For extended marine or submersion applications, we recommend confirming the specific grade with us, as performance can vary based on environmental conditions.

A heat gun is the recommended tool for even, controlled shrinking. Most standard heat guns set to 90°C–120°C (194°F–248°F) work well. In a pinch, a lighter can work for small-diameter tubes, but a heat gun gives more consistent results and reduces the risk of scorching the tubing or nearby components.

Yes. The assortment kit includes multiple diameter sizes that generally cover wire gauges from AWG 26 through AWG 2/0, making it compatible with most household, automotive, and marine wiring. The larger 328 Pcs and 530 Pcs kits include a broader range of diameters. See variant options for the specific sizes included in each kit.

The assortment typically includes multiple colors — commonly black, red, blue, yellow, green, and white — making it easy to color-code wiring for faster identification during repairs or installations. This is especially useful for heat shrink tubing for automotive wiring where tracing circuits matters. Exact color counts vary by kit size; see variant options for details.

If you plan to use the kit over time or work in a shared workshop, the "With Box" option is a practical choice. It includes a labeled storage case that keeps tubes sorted by size and color, so you're not digging through a bag mid-project. For one-time or single-project use, the standard set works just as well.