Aluminum alloy precise CNC-machined, solid and stable to use. 30mm diameter, up to 5kg/11.0 lbs load bearing. Built-in bubble which can help you find the quickly. 360°Swivel panoramic-view ballhead, ergonomic damping fine adjustment knob, coarse adjustment with precise adjustment, locking and safe effect. compatibility, features 1/4 inch thread screw and 3/8 inch bottom thread, suitable for most DSLR cameras, camcorders, tripods, tripods, sliders and monopods.