Notes: CAO028579 O-RING 41000 2-274 253.59x3.53 - is original KOMATSU product. CAO028579 O-RING 41000 2-274 253.59x3.53 -1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849