SIRUI E20 Series Ball Heads W/QR Plate (Arca-compatible)The E 20 ball head features separate adjustment knobs for panning and ball locking for maximum control and flexibility. A bubble level helps ensure your camera is properly aligned, and an Arca type compatible quick release plate aids in fast camera attachment. Item Includes: Sirui? E 20 Ball Head Sirui TY 50E QR Plate 6 Year Limited Warranty (we are authorized reseller) Overview: Each assembled component of SIRUI Ball Heads is produced by CAM