Sirui B-00KThe Sirui B 00K is a compact, lightweight ball head with a load capacity of up to 10kg. It has individual locks for panning and ball operation, and features a standard Arca type quick release system (one plate is included). Connects to any tripod with a 3 8" head mounting thread; the camera mount is the standard 1 4." Light cosmetic wear, most notably a scuff on the locking knob which does not affect function.