Notes: 129100-61821 SPRING, RETURN is original YANMAR product. 129100-61821 SPRING, RETURN5 is commonly used in transmissions/axles/engines 4TNE84-P, 4TNE88-NS, 4TNE88-YB, 3TNE84T-EFL2, 3TNE84-TFL2, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849