The F221B3/32-BK100-INCHES from Alpha Wire is flexible heat shrink tubing with 2 to 1 shrinkage ratio, 0.093" (2.36mm)/0.046" (1.17mm) diameter and black color. This flame resistant, fluid resistant, UV resistant heat shrink tubing made of irradiated polyolefin (PO) and has 90°C shrink temperature. Operating temperature range is from -55°C to 135°C.