in the 315-52540 series is part of a larger selection of Heat Shrink Tubing and Sleeves that are designed for applications in which installation and operation require an environmental protection. This particular Heat Shrink Tubing is characterized by the 2:1 shrink ratio, which means the tubing will shrink to 50% of its original diameter when heated. Additionally, it is flame retardant, halogen-free (the absence of halogens make them an especially safe option for use in certain environments), and has a 25.4/12.7 mm diameter range. The HellermannTyton 315-52540 series has a solid wall construction, excellent abrasion resistance, and excellent insulation qualities. This tubing is suitable for use in the most demanding environments, including industrial electrical wiring, electronics, automotive, and consumer products.