The Kubota W21TSS6690 is a genuine OEM spark plug designed for optimal performance in a wide range of Kubota agricultural and utility machinery. This essential component ensures reliable engine ignition, contributing to efficient operation and longevity of your equipment. It is compatible with numerous Kubota B-Series, BX-Series, F-Series, GR-Series, RTV-X-Series, T-Series, ZD-Series, and ZG-Series models.