The Kubota W21CKT3858 is a genuine OEM spark plug designed to provide efficient and reliable ignition for a wide range of Kubota machinery, including specific models of RTV utility vehicles, ZD mowers, and G series tractors. This essential component ensures optimal engine performance and fuel efficiency. It measures approximately 88.9 mm in length, 25.4 mm in width, and 25.4 mm in height, with a weight of 0.045 kg.