This is the Benro B00 + PU40 QRP Ball Head Dual Action [BRB00-PU40] Benro B series Dual Action Ballheads are precision manufactured from magnesium alloy with a smart durable finish. The heads feature separate maunal drag and lock controls, a standard universal quick release camera mounting plate system together with an independent smooth panning control and positive locking. Features: Universal Quick Release System The Quick Release System on the Benro Series B Heads is Arca Swiss compatible as well as being compatible with most other mainline quick release systems. For user convenience, all Seires B Heads are supplied with a Universal camera plate. 360 Degree Panning Accurate panoramas can be achieved using the graduated panning scale which facilitates accurate image alignment. Locking and Drag Contols The Series B Head incorporates separate lock and drag adjustment knobs. These assist in helping to avoind any confusion when working fast. Separate Pan Knob Benro B Series Heads incorporate a separate control knob for independent pan and lock The Benro PU40 Universal Quick release Plate, is Arca Swiss-style compatible and can be left attached to equipment for fast mounting on to universal heads. Specifications: Ball Diameter: 24mm Max. Height: 84mm Base Diameter:44mm Weight: 250g Screw Attachment: 1/4" Max. Load: 6kg All Models are compatible with Compact and SLR cameras. ...Contact us if you need more help.