For Tubes 48-51mm in Diameter. Supplied with M10 Bolt- Washer- Spring Washer & Wing Nut. T Knob Closure. M10 Fixing. 100Kg SWL. Black or Silver FinishSWL: 100Kg Tube Dimensions: 48-51mm Fixing: M10 Dimensions: 150 x 165 x 30mm Weight: 40g. The CLP12 is a slimline- lightweight aluminium self locking easy clamp designed for use on 48-51mm truss. SWL 100Kg. lighting clamp-self locking clamp