Description: FFGR-02 follow focus ring is a newly designed Pin-Lock tightening mechanism that helps photographers easily lock the belt to the lens. The gear ring belt is for follow focus, it is with film industry standard 0.8 module. The pin lock fastening mechanism secures the ring gear, ensuring that the following focus gear drive has a non-sliding grip on the focus ring of the camera lens. The ring gear is precision machined and CNC machine tool, and the knob is adjustable for easy fixing up and down. When used in combination with the FF-02, it can be used for lenses up to 105mm in diameter, and can be widely used in various professional cameras, digital SLR cameras, etc. Specification: Material: PVC+Metal Size: 75×75×6mm/2.9×2.9×0.23" Adjustable diameter -Film industry standard 0.8mm mod - Made of flexible elastic rubber - Compatible with focus system - Patented pin lock design prevents loose racks - Easy to wrap around any lens focus ring Package Includes: 1 Piece Gear Ring Belt Note: Please allow slightly errors due to manual measurement