3M's flexible polyolefin tubing offers an outstanding balance of electrical physical and chemical properties for a wide variety of applications. All FP-301 tubing has a 2:1 shrink ratio is split resistant mechanically tough easily marked and resists cold flow. Meets MIL-DTL-23053/5 Class 1 & 2 and AMS-3636 AMS-3637 requirements. UL Recognized and CSA Certified at 600 volts @ 125 degrees Celsius.