Manfrotto 509PLONG Video Quick Release Plate
509PLONG, the new extra long camera plate, suitable for all the latest Manfrotto Video Heads. This plate works together with the new ABR (Advanced Balancing Recorder) system, thanks to a special built-in index.  Technical specifications: Attaches By 1/4" screw attachment type; Attachment (Top) 3/8" screw; Depth 1.96 in; Height 0.39 in; Length 5.51 in; Material aluminum; Weight 3.18 oz.