This is the Custom Brackets Lens Plate for Lens 200-400mm [CBGLM2] The Custom Brackets Lens Plate for Lens 200-400mm (GLM2) is a 5.5" long lens plate that is ideal for use with 200mm, 300mm, and 400mm telephoto lenses. It is the required plate for mounting these long lenses unto the CB Gimbal series head. It attaches to the bottom of the tripod collar foot, and comes supplied with 3 mounting screws. Features: For Arca Swiss Style Quick Releases. ...Contact us if you need more help.