This is a real statement piece and a very 'on trend' cuff.  The cuff is stainless steel and we've used swarf (metal offcuts and shavings) as the basis for the 4 carbon and porcelaine bearings.  This piece looks great as a casual or a more formal piece.  The steel can be slightly manipulated to suit wrist and forearm size.  A great piece of motorsport wrist wear!
This is our prototype of this model, so it is £50 cheaper (normally £170) as it has a few minor scratches on the metal. 
Measurements are:
Length 73 mm
Diameter 60 mm
Weight 60 grams