Shrink tube in different colors and diameters. This tube shrinks to half of its diameter when heated (for example #51-339 shrinks from 4,8 mm to 2,4 mm Ø). Excellent for building your own wiring harness. The grey tube is ideal for the handlebar wiring harness. The clear tubes are available in HIS (regular) and Kynar (clearer, more abrasion resistant) to cover steel brake lines and electric wires to protect your paint job or aluminum from scratches.