The Kubota 1J09221090 is a genuine OEM piston ring set, designed as a +0.25 oversize replacement for specific Kubota engines. This essential engine component ensures proper piston sealing, optimizing compression and oil control. It is compatible with various Kubota B-Series compact tractors (B2320, B2620, B2920), RTV1100 utility vehicles, and ZD-Series zero-turn mowers (ZD326, ZD331). Weighing approximately 0.02 kg, this high-quality ring set is crucial for engine rebuilds and maintenance, restoring engine performance and efficiency.