ITEM DESCRIPTION You are buying (4) brand new set of Inner; Outer Air Filter Replacement KitEach Set includes: (1) Inner Canister FIlter and (1) Outer Canister FilterOuter Filter SpecsID: 2 1/2″OD: 4 1/8″Height: 10 3/4″Inner Filter SpecsID: 1 25/32″OD: 2 13/32″Height: 10 5/16″Replaces OEM Part Numbers:Replacement for Ariens: 21536900, 21537000, 21538600,Replacement for Bobcat: 4114746, 4164630, 6672467,Replacement for B&S: 4235, 841497,Replacement for Case: 86401594, 87300178, 87300179,Replacement for Caterpillar: 1213661, 1467472, Replacement for Clark Equipment: 6672467,Replacement for Club Car: 102498601,Replacement for E-Z-GO: 72987G01,Replacement for Exmark: 103-1327,Replacement for Ferris: 5022892X1, 5023141, 841237Replacement for Grasshopper: 100936,Replacement for Gravely: 21536900, 21537000, 21538600,Replacement for GROVE: 9304100193, Hustler: 785261,Replacement for Hyundhai: GG1-104170,Replacement for Jacobsen: 5000919,Replacement for John Deere: M131802, M144100,M164264,