Acratech GV2 Ball Head / Gimbal Head with Lever Clamp, Supports 25 lb Acratech GV2 Ball Head - 1/4"-20 Reducer Bushing - Detent Pin - Quick Release Clamp - Lever Clamp - Bulls Eye Level - Acratech 10 Year Warranty Lever-operated quick-release clamp with 15mm bullseye level, with detent pin to keep the plate from sliding out by mistake Works well with lenses up to 400mm f/4.0 and any tripod with a 1/4"-20 or 3/8"-16 threaded screw Full movements allow any camera position Precision CNC-machined