(From company literature) Manfrotto 488 Midi Ball Head. The new 488 Midi Ball Head answers the needs of the medium format user. With its solid aluminum construction and phenolic resin ball, this head is also ideal for all 35mm and digital cameras.
The 488 features a double-groove for rapid side-to-side movement, and a separate fast-action ratchet lever for 360 degree pan and easy to grip locking knob for -90 to +90 degree tilt movements. Camera attachment is via a 2" platform with a 1/4"-20 male thread, and head to tripod attachment is 3/8" female.
Please note: not shown is a calibration scale at the base of the head.