INCLUDES (2) 60, (2) 61, (2) 62,(2) 63, (2) 64, (2) 65, (2) 66, (2) 67, (2) 68, (2) 69, & (2) 70 size jets COMPATIBLE WITH gasoline carburetors such as Brawler: 4150, 4160 series Demon: 4150, 4160 series, FST: 4150, 4160, 4500 series, Holley: 2010, 2300, 4010, 4150, 4160, 4500 Series, and Quick Fuel: 4150, 4160, 4500 series CONVENIENTLY ORGANIZED in a pocket-sized 3" x 4-1/2" x 1-5/16" storage case BRASS JETS for durability and long life SPECIFICATIONS: 1/4 -32 thread Carburetor Standard Main Jet Kit with CaseFits Brawler, Demon, FST, Holley & Quick Fuel (Gas Carburetors)Sizes: 60-70 (1 Pair of Each Size)Includes Clear Plastic Storage case Includes (2) of Each Jet Size:60 61 62 63 64 65 66 67 68 69 70Fits these Gas Carburetors:Brawler: 4150, 4160 SeriesDemon: 4150, 4160 SeriesFST: 4150, 4160, 4500 SeriesHolley: 2010, 2300, 4010, 4150, 4160, 4500 SeriesQuick Fuel: 4150, 4160, 4500 SeriesCarburetors with a 1/4 in.-32UNF Thread Jet