Transition T-piece, with pre-stamped perforation, for connecting electrical installation ducts with corner ducts. The pre-stamped perforation allows the openings to be broken out for inserting the duct. for electrical installation duct: HKL2020 HKL2030 HKL2031 HKL2052 in combination with corner duct: EDK50 Dimension (approx. dimensions) H: 111 mm Material: ASA (acrylic acid ester-styrene-acrylonitrile graft copolymer) Color: cream white RAL: 9001 (similar)