TECHSPAN HAPO heavy-wall heat shrinkable tubing provides maximum reliability for insulating and sealing electrical connections and terminations, including direct burial, URD, and submersible installations. Rated for 1kV, 90°C continuous use, it features an internally coated dual-purpose thermoplastic liner for excellent insulating and environmental sealing protection for splices, connections, jacket repairs, and terminations. Offers excellent abrasion and impact resistance, and is resistant to common fluids and solvents.This TECHSPAN HAPO-500-0-IIL is a heavy-wall heat shrink tubing with a 3:1 shrink ratio, designed for 600V AC applications and rated for 1kV, 90°C continuous use. It has an expanded inner diameter of 0.51 inches and a recovered inner diameter of 0.16 inches, with a recovered wall thickness of 0.09 inches. The tubing is made of cross-linked polyolefin material and is black in color. It comes in standard 4 ft lengths and operates within a temperature range of -55°C to 110°C. It meets ICEA and NEMA insulation thickness standards and conforms to Western Underground Guides 2.4 and 2.5.