Sonovel&reg; Universal L Quick Release Plate Bracket for Arca Swiss Type Tripod Ball Head for Canon Nikon This Quick Release L Plate has a 1/4"-20 thread and is a spare or replacement part for Benro New generation B and J-series Ball head and other Arca-Swiss compatible Quick Release clamps. You can switch between vertical and horizontal orientations without rotating your ball head Length: 80mm (height) x 110mm (length) x 38mm (width); Width: 38mm (universal width of Arca-Swiss Standard QR plates). It is an universal design to fit different cameras. (screw size : 1/4" UNC)