Movo FR3 Adjustable 3-Piece Follow Focus Ring Gear Set - Includes 65mm, 75mm and 85mm Lens Rings (Standard 32 pitch - 0.8 mod) Universal design will work with most follow focus systems (standard 32 pitch - 0.8 mod) Includes 65mm, 75mm and 85mm Lens Rings Features large pitch diameter for more accurate focusing Durable construction 1 Year warranty