The Gitzo GH3382QD Series 3 Center Ball Head is an Arca-type compatible head that is an ideal match for Mountaineer Series 2 and 3 tripods. It stands 5" high, holds up to 40 lb and weighs 1.7 lb. The head has a separate lock for the 360° panning and another to control the movement of the ball. A tungsten disulfide coating on the ball helps keep the ball movement smooth and minimizes stick-slip. A screw-knob lock tightens down on the included quick-release plate and a bubble level helps you maintain straight horizons in your images. To allow for precise adjustments, a friction control dial is integrated into the large locking knob.