The Kubota W21CKT5045 is a genuine OEM air filter designed to provide superior filtration and protect the engine from harmful contaminants. This essential maintenance part ensures clean airflow, optimizing engine efficiency and longevity in a wide range of Kubota agricultural, construction, and utility machinery, including BX, B, L, ZD, GR, RTV, F, K, KX, U, and R series models. It features an outer diameter of 90 mm, an inner diameter of 49 mm, and a length of 175 mm.