The PB-236-18 Power Ball Dual Control Ball head with Quick Release is a full featured head, perfect for many applications. This head features dual controls for ball tension/lock and pan and is perfect for cameras weighing up to 18-pound capacity. The separate controls for pan and ball offer easy, ultra-smooth positioning. The calibrated features a standard 3/8-16" threaded opening for use on most tripod legs. The clamp style quick release has a bubble level and quick release safety lock for convenience and security. Technical Specifications: Ball: 36mm Height: 4" Capacity: 18lbs. Weight: 0.85lbs. Maximum Load: 18lbs