Cable protection duct, inside corner 90°, with snap-on cover, bottom section of duct unperforated, the potential equalization of the cover is automatic when snapped on, accessories for potential equalization, two joint connectors LST...E3 per joint, must be ordered separately. for cable protection ducts: LLK...E3 / LUK...E3 Dimensions (approx. dimensions) H x W: 40 x 40 mm Inner leg length: 75 mm Material: stainless steel, material no. 1.4301