The 202A163-3-0 from TE Connectivity / Raychem Brand is black color heat shrink boot with shell size 63 and thin shrink wall. This heat shrink boot has 1.681" (42.70mm) to 1.079" (27.41mm) large diameter and 1.681" (42.70mm) to 0.370" (9.40mm) small diameter. This is polyolefin (PO), semi-rigid heat shrink boot with length of 3.902" (99.11mm). Operating temperature range is from -55 to 135 °C (-67 to 275 °F).