Heat-shrink tubing is a shrinkable plastic tube used to insulate wires, providing abrasion resistance and environmental protection for stranded and solid wire conductors, connections, joints and terminals in electrical work.
3M™ 7000133622 EPS-400 Multiple Wall Heat Shrink Tube, 0.35 in ID Expanded, 0.08 in ID Recovered, 0.038 in THK Wall Recovered, 48 in L, Polyolefin, Black