COMPATIBLE WITH: Carburetor Main Jets Kit Fits for Holley Carb Main Carburetors 2010,2300,4010,4011,4150,4160,4500 series.Two nozzles of each size, totaling 16 nozzles PRODUCT SPECIFICATIONS: 2Set of 8Pcs 2240-8 Carburetor GAS Main Jets Kits,totaling 16 nozzles.1/4"-32 UNF Unified Fine Thread,Size:68 (0.069" / 1.75mm) 69 (0.070" / 1.78 mm) 70 (0.073" / 1.85 mm) 71 (0.076" / 1.93 mm) 72 (0.077" / 1.95 mm) 73 (0.079" / 2.00 mm) 74 (0.081" / 2.06 mm) 75 (0.082" / 2.08 mm) SIMPLE INSTALLATION: Carburetor Main Jets Kit are easy to install and can be completed in just a few minutes EXCELLENT QUALITY:Carburetor main jet kit is made of high-quality materials, finely processed, and the bores are smooth SERVICE: Please confirm that the parts are the correct ones you need by using the model description before purchasing. If you are not sure.We are very happy to answer your questions and handle the pre-sales and after-sales services well! 2240-8 2Set Carburetor Main Jet Kits/Jet Assortment Kits 68-75 (Thread size: 1/4"-32) Compatible with Holley Carb Main Carburetors 2010,2300,4010,4011,4150,4160,4500(Two nozzles of each size)