3M?? FP-301 Flexible Polyolefin TubingsFP-301 offers an excellent balance of physical, electrical and chemical properties for protecting a wide variety of electronic, electrical, and mechanical applications, such as cable splices, wire marking, harness covering, strain relief, and component packaging. Meets UL/CSA requirements for flame retardance (except Clear), 2:1 shrink ratio, rated for -55?C to +135?C (+275?F) and 600 V continuous operation. Meets MIL-DTL-23053/5 Class 1 or 2 requirements. - Minimum Shrink Temperature: 121?C. - Colors Available: 1-Black, 4-Clear (available in all put-ups), 2-Red, 3-White, 5-Yellow, 6-Blue, 7-Green (available in selected sizes of 4-foot lengths and in color assortments). Insert the color number where N appears in the stock number. UL E39100, CSA LR38227.6" pieces. Black only.3M?? FP-301 tubing offers an outstanding balance of electrical, physical and chemical properties for a wide variety of industrial and military applications. Rated for 135?C continuous operation, all FP-301 tubing is split resistant, mechanically tough, easily marked and resists cold flow.