This a Arco Swiss monoball head with quick release plate. I believe it is the B1 and it is. Has a knob to control the ball fuction. A knob to control pan.A knob to lock the quick release plate. It comes with a 1/4-20 camera screw to attach to your camera. I can supply a 3/8 adapter if you need (please notify me). It can be used for Digital, 35mm, medium format, light large format, personal video cameras, and a spotting scope. The item "Arco Swiss Ball Head with quick release plate" is in sale since Friday, October 24, 2014. This item is in the category "Cameras & Photo\Tripods & Supports\Tripod Heads". The seller is "jerruha37" and is located in Fort Lauderdale, Florida. This item can be shipped worldwide.