Precision specifications : These part models are M6/M8/M10/M12/M14/M16, providing safe sealing and preventing oil leakage 【 Easy Installation 】: No special tools or complex programs are required. They are designed for direct replacement during oil change or engine maintenance. Specification: Material: Rubber+Metal Gasket model: M6/M8/M10/M12/M14/M16 Quantity:100pcs Note: 1.Please allow error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!