Heat shrink is used to insulate wires offering abrasion resistance and environmental protection for stranded and solid wire conductors, connections, joints and terminals in electrical engineering.Kit contains;30 x 2.0 x 40mm25 x 2.5 x 40mm20 x 3.5 x 40mm20 x 5.0 x 40mm16 x 7.0 x 80mm8 x 10.0 x 80mm8..