Notes: 28134 O-RING 6187 R31 2-328 47x5.34 is original CARRARO product. 28134 O-RING 6187 R31 2-328 47x5.345 is commonly used in transmissions/axles/engines 134803, 134803, 136651, 136651, 142078, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849