ProX T-C6S Slim Dual "O" ClampThe ProX T C6S Slim Dual "O" Clamp allows you to create with trussing in a whole new way! You can connect any combination of single tube or box truss to extend your lighting rig into new looks. The ProX T C6S Slim Dual "O" Clamp features two "O" clamps connected together that fit the standard 2" trussing tubes. Features Medium Duty Dual Narrow Swivel Clamp For 2" (50mm) Tubing Rotates 360 Degrees Does Not Lock Minimum Tubing Diameter 1. 9" (48mm)