SUNWAYFOTO DPG-210R 200mm QR Plate / Nodal Rail Arca / RRS Compatible Sunway 210 This Item Includes: SunwayFoto DPG-210R Multi-Purpose Rail - 2x Allen Keys - 2x Safety Screws - 3x 1/4"-20 Screws Compatibility: Arca-type compatible and 1/4"-20 mount Camera Mount: 3x 1/4"-20 screws Construction: T6061 aluminum alloy with Type III hard anodized finish Dimensions: 1.5 x 0.4 x 7.9" / 3.81 x 1.02 x 20.07cm Groove Lengths: 1.7" / 4.32cm and 2.2" / 5.59cm