The SCT-NO.5-Z4-0-STK from TE Connectivity / Raychem Brand is black 4:1 heat shrink tubing with 27.94 mm ( 1.099 in ) to 8.38 mm ( .33 in ) inside diameter and 1220 mm ( 48 in ) length. This heat shrink tubing is made of irradiated modified polyolefin and has minimum shrink temperature of 125°C. Operating temperature range is from -40°C to 150°C.