THIS IS AN ENGINE MAINTENANCE TUNE UP KIT. IT INCLUDES AN AIR FILTER, PRE FILTER, OIL FILTER, FUEL FILTER AND TWO SPARK PLUGS. THE AIR FILTER FITS KOHLER: 24 083 03, 24 083 03-S, 24 083 03-S1, 24 883 03-S1, FITS ARIENS: 21536400, FITS GRASSHOPPER: 100928, FITS GRAVELY: 21536400, FITS TORO: 24 083 03-S AND ALSO FITS GY20576. HEIGHT: 3" OD: 7" ID: 5 1/2". PRE FILTER FITS KOHLER: 24 083 05, 24 083 05-S, FITS ARIENS: 2153630, 21536300 FITS GRASSHOPPER: 100929 AND FITS GY20576. THE FUEL FILTER FITS KOHLER: 24 050 02, 24 050 02-S, 24 050 10, 24 050 10-S1, 24 050 13-S, 24 050 13-S1, FITS WALKER 5020, FITS TORO: 83-120, 83-1320, 94-2690, FITS SNAPPER: 7046364, NEW HOLLAND: 269212, GRAVELY: 21539500, CATERPILLAR: 9Y4444, CASE: D59949, FITS ARIENS: 21539500, FITS BAD BOY: 063-5001-00. FITS FUEL LINE 1/4" ID, MICRON: 10, COMPATIBLE WITH GREATER THAN 10% ETHANOL FUEL. FITS CUB CADET 1500 AND 2000 SERIES TRACTORS. FITS MODELS M655, M665, FITS KOHLER: CH18-CH26, CV18-CV25, CH620-CH750, CV620-CV740, EFI ECH630-ECH749 AND ECV630-ECV749; FOR COMMAND 18 THRU 25 HP ENGINES. THE SPARK PLUGS FITS KOHLER: 12 132 02, 12 132 02-S, FITS MTD: 759-3336, FITS HUSQVARNA: 531308128, FITS ARIENS: 08811700, 21531100, 21534100, 21536800, 21537800, FITS BAD BOY: 015-8000-00, ALSO FITS 71G, CHM71G, RC12YC. THE OIL FILTER FITS KOHLER: 25 050 27, 25 050 33-S, 25 050 34-S, 52 050 02, 52 050 02-S, 52 050 02-S1, FITS ARIENS: 08597500, 20715100, FITS BAD BOY: 063-1060-00, 063-2010-00, 063-5400-00, FITS BOB CAT: 6513601, 6652366, FITS GRASSHOPPER: 100802, FITS TORO: 114-3494, 491056, 52 050 02-S, 85-4930, NN10147, FITS WOODS: 70939 ALSO FITS AM101207, HE 122-033P, TCA10018. THREAD: 3/4"-16 OD: 3" HEIGHT: 3 7/16" MICRON: 27. 8-11 PSI PRESSURE RELIEF VALVE. FITS MANY MODEL. Warning:Lead-Nickel-Cancer and Reproductive Harm