SIRUI Pro Ball Head K30 - Max.Load 31 Lbs Load Capacity: 31lbs, Weight: 1.1 lbs, Height: 4.41 inch Tilt Range: -45 / +90,Panoramic Rotation:360 Safety lock: Yes, Bubble Level: Yes Drag control knob: Yes, Independent Panning Lock: Yes Head Mount Thread: 1/4"-20, Base Mount Thread: 3/8"-16