Part Number: GM 12616850, 3536966, 14079550, 323429; Materials: Engine oil drain plug gasket is made of high quality rubber materials and are designed and manufactured to match the original washers, ensuring a perfect fit for your vehicles. Dimensions: OD: 0.81 IN/20.7 MM, ID: 0.43 IN/13 MM, Thickness: 0.1 IN/2.6 MM. Please confirm the size before purchasing. Package Include: 10 PCS per package. Widely Use: You can use the same engine oil drain plug gasket for multiple car models as long as the original size matches. 10 pcs Engine oil drain plug gasket 12616850