3M Bus Bar Tubing BBI-9A-20', 20 ft LengthGeneral Information Brand 3M Heat Shrink Type Heavy Duty Heat Shrink Tubing Product Type Bus Bar Tubing Country Of Origin United States Lead Time 2 days California Residents Proposition 65 Warning Dimensions and Specifications Expanded Wall Thickness 0. 054 in Inner Diameter After Shrink (Imperial) 0. 054 in Inner Diameter After Shrink (Metric) 3. 78 mm Inner Diameter Before Shrink (Imperial) 0. 127 in Inner Diameter Before Shrink (Metric) 8. 83 mm