TS punched section with mounting flange, 17 x 73 mm, for inner mounting level: for W/D: 600 mm, L: 590 mm, TS System Chassis 17 x 73 mm, Carbon steel, Zinc-plated, Assembly screws, 73269098, 4 pc(s), 5.397 lbs, 4028177212091, For universal skeleton structures or partial assembly. Simply locate into the punchings and secure.