Based on this product's specifications, here are some alternatives and similar models
Heat Shrink Tube CellPack 427622 CR 25.4/12.7 mm (1" to 1/2") mixed sizes
Summary description:
CellPack heat shrink tubing model 427622 CR with diameters 25.4 mm and 12.7 mm (1" and 1/2") designed for insulating, protecting and bundling electrical connections and cables. Made for heat-activated shrink fit, it provides mechanical protection and electrical insulation for splices, terminals and cable joints. Suitable for repair, installation and cable management tasks.