Blue single wall heat shrink tubing with a varying nominal diameters. Made from irradiated blue polyolefin, it's durable, abrasion resistant, and flame retardant. The 2 to 1 shrink ratio conforms to irregular shapes without splitting and it's Blue color is great for color coding or marking wire bundles. UL Listed and CSA certified. Temperature rating is -67°F to 257°F (-55°C to 125°C). Shrink temperature is 250°F (121°C). Sold in 4 foot sticks.