Notes: 000__602__5068 O-RING 6187 R31 2-328 47x5.34 is original CARRARO product. 000__602__5068 O-RING 6187 R31 2-328 47x5.341 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849