3M Heat Shrink Thin-Wall Tubing FP-301-3-Blue-50', 50 ft LengthGeneral Information Brand 3M Heat Shrink Type Single Wall Polyolefin Heat Shrink Tubing Tubing Type Single (Thin) Wall Country Of Origin United States Lead Time 38 days California Residents Proposition 65 Warning Dimensions and Specifications Expanded Inner Diameter 3 in Inner Diameter After Shrink (Imperial) 1. 5 in Inner Diameter After Shrink (Metric) 38. 1 mm Inner Diameter Before Shrink (Imperial) 3 in Inner Diameter Before Shrink (Metric) 76. 2