The Kubota W21CKT3286 is a genuine OEM air filter designed to provide superior filtration and protect your engine from harmful contaminants. This high-quality air filter is engineered to fit a wide range of Kubota compact tractors, zero-turn mowers, utility vehicles, and excavators, including BX, ZD, RTV, F, GR, K, KX, U, and ZG series models. It ensures clean air intake, maintaining engine efficiency and extending engine life. With an outer diameter of 90 mm, an inner diameter of 50 mm, and a length of 128 mm, this filter is a direct replacement for the original part.