This pack contains 10 copper washers sized 7 x 18 x 2 mm, designed as solid gaskets for sump oil seals and drain plug applications. Copper provides good malleability for a tight seal and helps prevent leaks in oil systems. The washers are corrosion resistant and suitable for use in engine and machinery environments. Key benefits Reliable sealing for oil sumps and drain plugs to reduce leaks Malleable copper material enables full seating and even compression Corrosion resistant for lasting performance in oil systems Compact 7 x 18 x 2 mm size fits many standard fittings Supplied as a readytouse 10piece pack for replacements or maintenance Key attributes Material: copper Type: solid gasket Size: 7 x 18 x 2 mm Quantity: 10 pieces per pack Application: sump oil seal and drain plug sealing in automotive and industrial equipment Compatibility: designed for fittings that require 7 x 18 x 2 mm copper washers Performance: supports reliable leak prevention under normal operating conditions Applications and use cases Use case 1: worn copper washer on an automotive oil pan drain plug to stop oil leaks Use case 2: Seal engine or gear oil sump connections in small to midsize engines or machinery Use case 3: Seal hydraulic or lowpressure oil fittings that specify a 7 x 18 x 2 mm copper washer Installation and handling tips Ensure mating surfaces are clean and of old sealant or debris Place the washer between the bolt head or fitting and the sealing surface Tighten to the manufacturer's torque specification to avoid deformation Inspect for leaks after initial operation Care and storage Store in a dry place to prevent oxidation Handle with clean hands or gloves to keep copper of oils and contaminants This description reflects the product's 10PCS/Pack, 7x18x2mm copper washer solid gasket design for sump oil seal, and its intended automotive and industrial sealing applications.