Description PICO 1/2″ to 1″ Heat Shrink Tube Packs – 8251-K. Adhesive lined polyolefin, heat shrinkable tubing. Tubing is designed for environmental sealing of electrical components including wire splices, harness breakouts and cable ends from fluids, moisture and corrosion. The adhesive inner lining bonds to a wide variety of substrates. KEY SPECIFICATIONS FLAMMABILITY RATING UL224 / VW-1 MILITARY SPEC. MIL-DTL-23053/5 SHRINK RATIO 3:1 SHRINK TEMP. 90°C (194°F) TEMPERATURE RATING °C -55 TO 135 TEMPERATURE RATING °F -67 TO 275 VOLTAGE 600V