Benro IB0 Triple Action Ballhead with PU50 PlateThe IB0 Triple Action Ball Head is an Arca type compatible head with a load capacity of 13. 2 lb. It stands 3. 5" high, and weighs 11. 3 oz. There are separate locks for both the ball movement and the 360 panning motion, as well as a friction control knob. A 90 notch makes it easy to switch to portrait orientation. The numbered scale on the head's base allows for easily repeatable pans, and a bull's eye bubble helps ensure they head is level with the