HellermannTyton Heat Shrink Heatshrink w/o adhesive 612814 - HellermannTyton 339-00649, HellermannTyton's heat shrink tubing, part number 339-00649, features a transparent design with a 4:1 shrink ratio. Made of PTFE, it's thin, flexible, and non-flammable, providing excellent cable insulation. Ideal for electrical applications, it ensures reliable protection in demanding environments. HellermannTyton 339-00649 Heatshrink tubing transparent 6.30mm 4:1