The Kubota W21TSS5918 is a genuine OEM inner air filter designed to provide superior filtration for various Kubota B, L, and MX series tractors. This essential component prevents dust and debris from entering the engine, maintaining optimal performance and extending engine life. It measures approximately 267 mm in length, with an outer diameter of 89 mm and an inner diameter of 70 mm, and weighs around 0.45 kg.