This is for 1 Filter , for a pair the quantity must be adjusted to 2 .

Filters are approx 5.5 X 1 inch 

Our Air Filters are  made from Stainless Steel so they won't rust, comes with a washable sponge filter  ,

Filter is suitable for HS4 and HIF4 . carburetors . SU 1 1/2 inch 

Please note 1.5 inches is not the size of aperture in Filter , it is the size of Carburetor butterfly