Heat-shrinkable Superpolymer Insulation Tubing 1. Heat-shrinkable 2. Softness, antiflaming, shrinking fast Our non-halogen antiflaming heat-shrinkable bushing is made from high quality superpolymer; its proportion ... , white, blue gray, yellow-green, red, yellow, green, or transparent. Heat-shrinkable Superpolymer Insulation Tubing