TS punched section with mounting flange, 17 x 73 mm, for outer mounting level: W/D: 1200 mm, L: 1140 mm, TS System Chassis 17 x 73 mm, Carbon steel, Zinc-plated, Assembly screws, 73269098, 4 pc(s), 10.750 lbs, 4028177212121, For universal skeleton structures or partial assembly. Simply locate into the punchings and secure.