For Holley Carburetor MAIN JETS For 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) 80 0.089"/2.2606 mm 81 0.092"/2.3368 mm 82 0.094"/2.3876 mm 83 0.0975"/2.4765 mm 84 0.099"/2.5146 mm 85 0.10"/2.54 mm 86 0.101"/2.5654 mm 87 0.103"/2.6162 mm 88 0.104"/2.6416 mm 89 0.1045"/2.6543 mm Carburetor MAIN JETS Assortment Kit 1/4-32 GAS MAIN JETS ASSORTMENT KIT 80-89 2 EACH 20PACK