3M™ FP-301 Heat Shrink Tubing offers an outstanding balance of electrical, physical and chemical properties for a wide variety of applications. Each kit contains tubing in a size 3/16, size 1/4, size 3/8, size 1/2, size 3/4, and size 1. 3M™ FP-301 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. Rated for 275(deg)F(135(deg)C) continuous operation