This pack contains 10 Copper Washer Solid Gasket Sump Oil Seals, sized 18x25x2 mm. These copper washers are designed to provide a reliable, even seal for oil sump and related fittings, delivering consistent performance under heat, vibration, and pressure. Key benefits Reliable sealing with copper material: Copper offers good corrosion resistance and thermal stability, helping maintain a tight seal in automotive and machinery applications. Solid gasket design: Provides uniform compression across the contact surface to reduce the risk of leaks around drain plugs and fittings. Precise sizing for compatibility: Inner diameter 18 mm, outer diameter 25 mm, thickness 2 mm, ensuring a proper fit for standard drain plug and sealing applications. Economical, convenient pack: 10 pieces per pack to cover multiple seals or replacement needs. Broad compatibility: Suitable for automotive, motorcycle, and industrial equipment that require copper sealing washers in the 18x25x2 mm size. Key attributes Functionality: Copper washer gasket used as a sump oil seal and sealing element for drain plugs and fittings. Compatibility: Fits components that require an 18 mm inner diameter, 25 mm outer diameter, and 2 mm thick copper washer. Size: 18x25x2 mm (inner diameter 18 mm, outer diameter 25 mm, thickness 2 mm). Material: Copper, solid gasket construction. Performance: Designed to provide a dependable seal under typical engine and machine operating conditions. Quantity: 10 pieces per pack. Applications and use cases Automotive engine oil drain plug: worn washers during oil changes to restore a reliable seal and prevent oil leaks. Oil sump and pan fittings: Sealing for oil sump bolts or pan connections that require copper washers of the 18x25x2 mm size. General machinery sealing: Suitable for hydraulic lines, gearboxes, and other equipment that use copper sealing washers of the same specifications. How to use Ensure mating surfaces are clean and of oil, dirt, and damage. Install a copper washer (onetime use is recommended) with the corresponding drain plug or fitting. Torque to the vehicle or equipment manufacturer's specifications, and check for leaks after initial operation. Note: Use copper washers for each service to maintain sealing performance. These washers are intended for sealing and gasket applications in automotive, motorcycle, and machinery environments that require an 18x25x2 mm copper washer.