The PAI rear crankshaft seal is engineered with precision dimensions of 6.06 " ID x 7.34 " OD x 0.75 " thickness, specifically designed for Caterpillar engines. This seal serves as a reliable protection to prevent oil leaks from the rear of the crankshaft. Its construction provides a tight seal, effectively maintaining optimal engine performance over time. It acts as an effective barrier against dirt and contaminants entering the engine, while maintaining alignment for smooth crankshaft operation and efficiency.