Review on 82 Ft XHF 1/2 Inch (13mm) 3:1 Waterproof Heat Shrink Tubing Marine Grade Wire Cable Adhesive Lined Tube Insulation Seal Moisture Corrosion Air Leakage Black by Luis Neels

I ordered the 3.2 mm / 1/8" tubing. When it arrived, it seemed quite large; it was 4.1 mm inside diameter (a 4 mm drill bit could be easily inserted), which is quite a bit larger than I wanted. I returned it without hassle to a local Whole Foods. I'll order again, but with their smallest diameter shrink tubing.