Gitmo's Center Ball Heads are extremely balanced and versatile heads, engineered and designed focusing on ultimate smoothness and precision of the movement and locking. GH1382QD is the medium-sized head, designed for Series 0 and 1 Mountaineer tripods, and also fits between the folded legs of Series 2 Traveler tripods. Despite its slim design, it is fully featured including the friction control knob positioned inside the ball locking knob. It is supplied with the short, Arce-Swiss compatible plate (GS5370SD), but is also compatible with all of Gitmo's D profile plates and fits most Arce-Swiss style plates from other brands. On the head base there is a removable safety pin that acts as a safety catch and helps prevent the plate from sliding out. If this safety pin blocks the mounting of other brand plates or prevents them from sliding out simply remove the safety pin with the key provided. Technical Specifications: Series 1 Material aluminum Quick Release yes Plate Type GS5370SD Panoramic Rotation 360 Degree Lateral Tilt -90 Degree / 40 Degree tilt range Independent Pan Lock yes Ball Friction Setting yes Working Height 4. 41 in Weight 1. 1 lbs. Load Capacity 30. 86 lbs.