SummitLink 306 Pcs Red Black Assorted Heat Shrink Tube 8 Sizes Tubing Wrap Sleeve Set Combo 306pcs of assorted red black heat shrink tubing in 8 sizes. Sizes: 1mm, 2mm, 3mm, 4mm, 6mm, 8mm, 10mm, 14mm Covers all gauges of wires you'll need in many applications.