Holley Main Jets (20 OF THEM) Sizes - 2 each 70-71-72-73-74-75-76-77-78-79 1/4"-32 UNF Unified Fine Thread Use In Street & Race Applications Specific dimensions 70 0.073"/1.8542 mm 71 0.076"/1.9304 mm 72 0.079"/2.0066 mm 73 0.079"/2.0066 mm 74 0.081"/2.0574 mm 75 0.082"/2.0828 mm 76 0.084"/2.1336 mm 77 0.086"/2.1844 mm 78 0.089"/2.2606 mm 79 0.091"/2.3114 mm Fits Holley & Holley Style Carburetors Including AED, Barry Grant, Quick Fuel, Demon, Avenger, Etc.. These Will Come In A Plastic Storage Container (20 INDIVIDUAL JETS) Note: Default Sizes -2 each 70-71-72-73-74-75-76-77-78-79 If you need other sizes, please let us know the quantity and size of the products you need by email, or indicate the quantity and size of the products when making payment. We will ship based on the quantity and size! At least 2 of each size Holley Carburetor MAIN JETS Sizes - 2 each 70-71-72-73-74-75-76-77-78-79 Holley Main Jets (20 OF THEM) 1/4"-32 UNF Unified Fine Thread Use In Street & Race Applications Fits Holley & Holley Style Carburetors Including AED, Barry Grant, Quick Fuel, Demon, Avenger, Etc.. These Will Come In A Plastic Storage Container (20 INDIVIDUAL JETS)