Braided Expandable Sleeving, 0.50 Inches (12.7 mm) Nominal Inside Diameter, 0.250 Inches to 0.750 Inches (6.4 mm to 19.1 mm) Nominal Diameter Range, Polyethylene Terephthalate, Gray, 500 Foot (152.4 Meters) Reel. Temperature rated for use up to 257 degrees Fahrenheit (125 degrees Celsius). Sleeving provides continuous abrasion resistance for wires, cables and tubing. The highly flexible open weave will not trap heat or humidity. Lightweight durable protection. Allows for use with irregular shapes. UL Recognized. CSA Certified, Compliant with U.S. and European passenger rail standards.