Notes: 204-3096 P/O 19245 RING 39.5X44.5 X2.5 is original CATERPILLAR product. 204-3096 P/O 19245 RING 39.5X44.5 X2.51 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849