You will get the air filter that is pictured. These thread onto 900 Series Amal 928 930 932, these are shorter than the other Pod filters we carry, they only stick out 2 11/16" when installed on the Amal carb to give you more clearance for single carb applications or to clear sidecovers, oil tank... The large OD is 2 15/16" the small OD is 2"