1 1/4" red polyolefin heat shrink tubing. 4 Ft Stick. 3:1 shrink ratio. UL, CUL, ROHS, Halogen Free, Flame Retardant, F Mark, UL224, REACH, VW1 certified at 600v. Operating temperature range is from -55 degree C to 125 degrees C (-67 degrees F) to 257 degrees F) and the minimum shrink temperature is 110 degrees C (230 degrees F)