DEI Hi-Temp Shrink Tube Spool - 3mm x 50ft. 010855Professional grade, military spec, flexible polyolefin tubing Provides excellent protection from dirt, dust, solvents and foreign materials Also provides strain relief 3: 1 shrink ratio without reduction to original length Use to insulate wires, connections, terminals, wire splicing and more Works for 67deg. F to 275deg. F temperatures Apply at 120deg. F to 180deg. F with a heat gun