Lightweight and low profile professional coupler,developed for installations where load capacities of up to 264lbs (120kg) are required TUV approval, Unique window for safety wire access M10 hex head bolt standard, double level's counter sunk for M10 or 3/8' hex head bolt. Fits O.D. 32-38mm tube High tensile 6061-T6 aluminum SWL: 264lbs (120kg) - Black Finish