Shrink-Kon Thin-Wall Heat Shrinkable Tubing Assortment. Precut in 6 in. Lengths, Black, (32) Diameter 3/16 in., (20)-Diameter 1/4 in., (8)-Diameter 3/8 in., (6)-Diameter 1/2 in., (4)-Diameter - 3/4 in., (4)-Diameter - 1 in. Includes Plastic Storage Case.