Inner corner 90°, with tabs, fastening is done through the adjacent cover pieces. for electrical installation duct: HKL3030.6 Dimensions (approx. dimensions) H x W: 32 x 30 mm Outside leg length: 41 mm Material: ASA (acrylic acid ester-styrene-acrylonitrile graft copolymer) Color: cream white RAL: 9001 (similar)