The Kubota 1626121090 Piston Ring Set is a genuine OEM component designed for various Kubota compact diesel engines, including the D722 and D902 series. This set provides the necessary rings for one piston, ensuring proper compression, oil control, and heat transfer within the engine's combustion chamber. Manufactured to Kubota's stringent quality standards, these piston rings are crucial for maintaining engine performance, fuel efficiency, and longevity. Ideal for engine overhaul or repair, this part ensures a precise fit and reliable operation in compatible Kubota tractors, utility vehicles, and zero-turn mowers.