Made in USA. Machined from billet aluminum, this Pure Stealth Holley carburetor adapter fitting kit adapts from 7/8-20 threads to 3/8" hose barb and seals with the included crush washers. Fits a variety of Holley dual feed carburetors. Verify thread pitch of your carburetor before ordering. Fitting is coated with our proprietary Pure Stealth black ceramic coating. The coating is extremely durable but it can be scratched. Care should be taken during installation process to prevent damaging the coating.