3M Cold Shrink Insulator 8429-12, 900-1000 kcmil (500 mm²)General Information Brand 3M Model Cold shrink Product Type Cold Shrink Splice Type Cold Shrink Country Of Origin United States California Residents Proposition 65 Warning Dimensions and Specifications Conductor Sizes (Imperial) 1000 kcmil Conductor Sizes (Metric) 456 mm Inner Diameter After Shrink (Imperial) 0. 839 in Inner Diameter After Shrink (Metric) 21. 3 mm Inner Diameter Before Shrink (Imperial) 2. 85 in Inner Diameter Before Shrink (Metric)