50 Piece Heavy-Duty Heat Shrink Tubing Large Drawer AssortmentOur Heat shrink tubing assortments (or commonly heat shrink or heatshrink) is filled with 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 wiring. Our storage bins made from cold rolled steel and finished with a rust and acid resistant baked enamel offer superior organization for all of your small parts. When