HEAT SHRINK TUBING, 4.75MM ID, PO, BLACK,PK OF 25 4FT/1.22M PIECES; Shrink Tubing / Boot Colour:Black; Shrink Tubing / Boot Material:PO (Polyolefin); Shrink Ratio:2:1; I.D. Supplied - Metric:4.75mm; I.D. Recovered Max - Metric:2.36mm