Dorman's Engine Oil Drain Plug Gaskets are conveniently available in packs of varying quantities. Many styles are offered, including Copper, Aluminum, Nylon, Metal/Rubber, Inset, Fiber and Crush gaskets. Replacement is recommended at every oil change. Oil filter caps are available separately. Direct replacement gaskets and some universal gaskets available. Proper fit with the drain plug ensures a tight seal Gaskets are also included with many of Dorman's Engine Oil Drain Plugs and Pans Made to specific sizes and standards to ensure a proper fit Designed and constructed to strict engineering quality standards Product Specifications Gasket Material: Copper Gasket Thickness (mm): 2.29 mm Inside Diameter (in): 0.527 In. Outside Diameter (In): 0.752 In. Package Contents: 25 Copper Gaskets Package Quantity: 25 Brand: Dorman - AutoGrade - Boxed Packaging Type: Box