... and other industrial fields.. JDD MSBG Dual wall heat-shrinkable tube is made of an external high quality ... an hot melting adhesive inner layer. Exposed to heat source, the inner layer begins to melt and ... or wires. Material: PE (Polyethylene)Shrinking ratio: 3:1 and 4:1Operating range: -45°C +125°CStandard color ... requestCertified: UL, CSA, RoHS, Halogen free.Tool: heat gun, oven Dual Heat Shrink Tube