The Kubota W21CKT4974 is a genuine OEM air filter designed to provide superior engine protection for various Kubota BX and ZD series machinery. This high-quality filter ensures optimal air intake, preventing harmful contaminants from reaching the engine, thereby extending engine life and maintaining peak performance. With an outer diameter of 95mm, an inner diameter of 51mm, and a height of 120mm, it is a direct replacement for the original part.