Transition T-piece, with pre-stamped perforation, for connecting skirting board ducts with corner ducts. The pre-stamped perforation allows the openings to be broken out for inserting the duct. Please order cover plate APAS... to cover the fastening screw separately. for skirting board channel: SDK70 in combination with corner channel: EDK35 EDK50 Dimensions (approx. dimensions) H x W: 89.5 x 58 mm Material: ASA (acrylic acid ester-styrene-acrylonitrile graft copolymer) Color: cream white RAL: 9001 (similar)