3M™ Heat Shrink Tubing FP-301 Is A General Purpose, Thin Wall Tubing That Provides A Balance Of Electrical, Physical and Chemical Properties, Making It Ideal For Industrial and Military Applications. This Tubing Has A 2:1 Shrink Ratio and Provides Flame Retardant Insulation For 600V Rated Applications. It Has A Flexible Polyolefin Construction That Offers Moisture Seal Protection.