Based on this product's specifications, here are some alternatives and similar models
CellPack SR2 Heat-Shrink Tubing 6-22 mm, 1000 mm, Black
Summary description:
The CellPack SR2 heat-shrink tubing is a high-quality, thick-walled insulation solution designed for electrical cable protection. With a shrink range of 6-22 mm and a length of 1000 mm, this black, adhesive-free tube provides reliable mechanical and electrical protection for various wiring applications. It is an essential component for professional cable management, repair, and insulation tasks in industrial and residential electrical installations.