Notes: 288-7224/GEUG069269 PLANETARY CARRIER ASSEMBLY 28.50 MR2 is original CATERPILLAR product. 288-7224/GEUG069269 PLANETARY CARRIER ASSEMBLY 28.50 MR21 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849