Traveler Center Ball Heads are stripped-down versions of our standard center ball heads. The magnesium body is designed to achieve maximum structural strength from minimum weight and size, and a single rationalized lever controls both pan and ball locks.GH2781TQD is the popular Series 2 version, supplied with the new hybrid quick release system, which comes with an Arca-style plate but also accepts Gitzo C-profile plates. specs ball locking yes series 2 material magnesium quick release yes plate type GS5370D panoramic rotation 360 Degree lateral tilt +100 Degree / -30 Degree tilt range independent pan lock no ball friction setting no working height 4.72 in weight 1.28 lbs safety payload 15.43 lbs