3M Heat Shrink Thin-Wall Tubing, FP-301, black, 1/2 in x 100 ft (1.27 cm x 30.48 m) spool 3M Heat Shrink Thin-Wall Tubing is a heat-shrinkable, flexible polyolefin tubing that offers an outstanding balance of electrical, physical and chemical properties for a wide variety of industrial and military applications. Product Information Brand 3M Part # 7000021421 Origin Country USA Product Type Enclosures Product Information2:1 shrink ratioDesigned to withstand elevated temperatures to 300°C (572°F) for short periods of timeFlame-retardant tubing is rated for 600V applicationsFlexible and split resistantRated for 135°C (275° F) continuous operationRated for 600V applicationsSuggested ApplicationTypically used as shrink-fit electrical insulation over cable splices and terminationsUsed for lightweight wire harness covering, wire marking, wire bundling, component packaging and fire-resistant covering
