Dual Wall Adhesive-Lined Polyolefin Heat Shrink Tubing, 2 Pc. Red + Black Dual Wall Adhesive-Lined Polyolefin Plastic Heat Shrink Tubing - 3:1 Shrink Ratio 2 Pieces: 1 Red + 1 Black Each Tube Measures 3-1/16" Long x 1-1/16" Diameter U/L Listed