Delfingen NU-FLEX HT fiberglass sleeving is a thermal class 240, heat-resistant, non-flammable electrical insulation made from flexible continuous-filament fiberglass yarns. It is available in sizes from AWG 24 to 1-1/8 in. nominal diameter, with standard wall construction and lengths such as 50 ft, 100 ft, and 250 ft depending on size. Designed to withstand temperatures from -59°C to 648°C, it offers excellent VW-1 flame resistance and reliable protection for wire and cable applications where durability and high-temperature performance are critical.