This is a Racers Edge RCE1303 24 pc. Heat Shrink Tubing Assortment.
Racer's Edge heat shrink assortment provides 24 pieces of the most popular tubing sizes, solving the common problem of having the proper size available for any specific modeling or electronic task. This economical package contains four pieces (2 red, 2 black) of each of these diameters: 1.5 mm, 2.5 mm, 3.0 mm, 4.5 mm, 6.0 mm and 9.0 mm
