CowboyStudio FT6692AH Photography Heavy Duty Camera Tripod Action Ball Head Quick Release Plate One (1) Tripod head FT6692H Screw size: 1/4 inch for camera; 3/8 inch for tripods compatible to all major brands. Smooth operation with one hand, Horizontal and vertical position Plate size-53mm X 43mm (2.08 X 1.69 inch) Ball head height-108mm (4.25 inch), Max. load capacity-4.0kg ( 8.82 lbs)