Based on this product's specifications, here are some alternatives and similar models
Ergom TCREL Heat Shrink Tubing 25.4/12.7 mm Black
Summary description:
The Ergom TCREL heat shrink tubing with a shrink ratio of 2:1 and dimensions of 25.4/12.7 mm is designed for professional electrical insulation and cable protection. This black tubing provides reliable mechanical protection and moisture resistance for wire connections. Ideal for industrial and domestic electrical installations, it ensures a secure fit and long-lasting durability in various environmental conditions.