Notes: 138135 EPIC.PLANETARY GEAR Z28 M3.5 is original CARRARO product. 138135 EPIC.PLANETARY GEAR Z28 M3.55 is commonly used in transmissions/axles/engines 138094, 138111, 138116, 138117, 138630, . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849