Allstar ALL26044 5-1/8" Mounting Diameter 2.5" Tall Machined Deluxe Model Aluminum Carburetor Hat with Sealing O-Ring Carburetor hat is a deluxe model with a 5-1/8 inch mounting diameter Carb hat is 2.5 inch tall and is made from quality machined aluminum and features a sealing o-ring Aluminum carb hat keep the carburetor safe when the air cleaner is removed Sold each It has a 90 day limited warranty