Top quality Casa air bellow and chrome K & N style power air filter. These are connected using a piece of pipe (supplied in kit) to connect the two together to stop the bellow folding in on itself. Comes with 3 x jubilee style clips, this includes the one to fit to the carburettor.
 
This is for the 22mm standard 150/200cc carburettors, and will also fit the PHBH 26, 28 and 30mm Dellorto carbs.