Manfrotto MVH502A tripod head with a shortened base screw is suitable only for mounting on a slider. It includes a counterbalance mechanism for accurate, reliable balancing. Smooth hydraulic drag provides optimal control for pan and tilt. Teflon friction elements improve stability and separation of vertical and horizontal movement. With a 75 mm base, the Manfrotto MVH502A can be mounted on a 75 mm bowl. Included: Manfrotto MVH502A head, pan handle, quick-release plate, 1/4″ and/or 3/8″ screws.