The Kubota W21CKT4258 is a genuine OEM air filter designed to provide superior engine protection by effectively removing dust, dirt, and debris from the air intake system. This essential maintenance part ensures optimal engine performance and longevity for various Kubota B, BX, ZD, F series tractors, mowers, and RTV-XG850 utility vehicles. With an outer diameter of 90mm, an inner diameter of 55mm, and a length of 180mm, this filter is engineered to exact specifications for a perfect fit and reliable filtration.