Genuine OEM Hyundai Cylinder Block O-Ring, part number 211612U000. This small, precision-engineered O-ring is designed to create a tight seal between components within the engine's cylinder block assembly. It prevents the leakage of fluids or gases, which is crucial for maintaining engine performance and preventing damage. Measuring approximately 0.014m in length, 0.014m in width, and 0.002m in height, this genuine OEM O-ring ensures the correct material composition and dimensional accuracy for a reliable, long-lasting seal under demanding engine conditions.