HEAT SHRINK TUBING, 3.175MM ID, PO, BLACK, 100FT, PK25; Shrink Tubing / Boot Colour:Black; Shrink Tubing / Boot Material:PO (Polyolefin); Shrink Ratio:2:1; I.D. Supplied - Metric:3.175mm; I.D. Recovered Max - Metric:1.6mm