SummitLink 550 Pcs Assorted Heat Shrink Tube 5 Colors 5 Sizes Tubing Wrap Sleeve Set Combo 550pcs of assorted heat shrink tubing in 5 Colors 5 sizes. Sizes: 1mm, 2mm, 3mm, 4mm, 6mm Covers all gauges of wires you'll need in RC hobbies and many other applications.