Industrial duct, 90° inner corner, with snap-on cover, duct base unperforated but with screw connector holes in the sides, the potential equalization of the cover is automatic when snapped on, accessories for potential equalization, two joint connectors LIV 60 per joint, must be ordered separately. VDE certified! for industrial ducts: LUE... LI... Dimensions (approx. dimensions) H x W (approx. dimensions): 60 x 60 mm Inner leg length: 75 mm Material: Steel, strip galvanized in accordance with DIN EN 10346