Pirate Mfg 1" Open Square Phenolic Carburetor Spacer Fits Edelbrock Holley SBC BBC Chevy V8 BRAND NEW 1" Phenolic Plastic Carb Spacer And Stud Kit For 4150 Series Carbs Fits Holley, Edelbrock, Barry Grant (Demon), Chevy, Ford, Mopar and any other square bore carburetor Kit Contains (as pictured): (1) 1" Phenolic Plastic Spacer, (2) Gaskets, (4) Bolts, (4) Washers, (4) Nuts