The Kubota W21CKT2684 is a genuine OEM air filter designed to provide superior engine protection for various Kubota machinery. This filter ensures clean air intake, preventing harmful contaminants from reaching the engine, thereby extending engine life and maintaining optimal performance. It is compatible with a wide range of Kubota equipment including B-Series tractors (B2320, B2620, B2920), BX-Series sub-compact tractors (BX1860, BX1870, BX1880, BX2360, BX2370, BX2380, BX2660, BX2670, BX2680), ZD-Series zero-turn mowers (ZD1011, ZD1021, ZD1101, ZD1211, ZD1511), F-Series front mowers (F2690, F3990), B26 loaders, and RTV-X utility vehicles (RTV-X1100, RTV-X1120, RTV-X1140). With an outer diameter of 90 mm, an inner diameter of 46 mm, and a height of 175 mm, this filter is a direct replacement for the original part.