The 3M™ heat shrink thin-wall tubing FP-301 kits are a versatile assortment of flexible polyolefin heat shrink tubing. The kits are available in two different types: assorted colors or black only. Each box is constructed of rugged translucent plastic with product and installation information on the cover. Heat shrink kits allow an engineer, designer or technician to have a complete selection of popular sizes and colors for small projects and product development programs.