Manfrotto 520BALLSH 75mm Short Half Ball; comes complete with a short locking handle to mount all Manfrotto flat-base heads to any 75 mm bowl tripod including the 529B Hi-Hat (with optional adapter 319); 3/8'' screw to attach the head; short levers ideal for shooting close to the ground; diameter: 75 mm; material: aluminium; weight: 376 g