Made of aluminum extrusion, this coupler equipped with superior bearings allows to adjust the weight to tilt your MōVI Pro Carbon Fiber Ring/gimbal as a support system while using with a Ready Rig GS. Features a removable rubber pad inside which allows to fit for any tube size or Gimbal handlebar comes with dia. 25mm or 30mm. There are also threaded holes including 3/8”-16 and 1/4”-20 (4 pcs) on the main base to accept a wide range of adapters, grip accessories, cold shoe mount, lights or monitor arm. etc. (set for two)