Notes: 229-5093/GEUG58331 COUNTERPLATE Diff. locking SP. 1.5 is original CATERPILLAR product. 229-5093/GEUG58331 COUNTERPLATE Diff. locking SP. 1.51 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849