Feature:1" Thick plastic carburetor spacer is suitable for all square bore carburetor.Engineered to withstand extreme intake manifold temperatures, this spacer was designed to insulate and reduce heat flow to the carburetor.Four hole spacers are additionally offered with specially contoured holes which helps increase air velocity under the carburetor.The carburetor spacer fits for automotive. This is non-OEM product.Specification:Color: BlackMaterial: PlasticCenter Hole Diameter: 44mm/1.73"Fit for: for Holley, for Edelbrock, for Barry Grant (demon) SB & BB Chevy, for Ford Package Included:1 x Spacer2 x Gasket4 x Studs4 x Nuts4 x Washers.