Notes: 719803-22900 PISTON ASSY, 0.25 OS is original YANMAR product. 719803-22900 PISTON ASSY, 0.25 OS5 is commonly used in transmissions/axles/engines 3TNV82A-BPTBZ, 3TNV82A-BSHY, 3TNV82A-BSTB1, 3TNV82A-BQIKA, 3TNV82A-BPTBT, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849