Notes: 1990691 WASHER SHIM 50.3X78X3.2 MAT101 STD. CARR is original CATERPILLAR product. 1990691 WASHER SHIM 50.3X78X3.2 MAT101 STD. CARR1 is commonly used in transmissions/axles/engines . if you have any questions please do not hesitate to contact us via Whatsapp +17275652849