These copper washers are solid gaskets designed for sump oil seals and drain plugs. Each washer measures 13x18x2 mm (inner hole 13 mm, outer diameter 18 mm, thickness 2 mm). The pack contains 10 pieces, providing multiple replacements for ongoing maintenance. Key benefits Reliable oil sealing: copper material deforms under compression to fill surface irregularities, helping prevent leaks at the drain plug or sump seal. temperature and oil resistance: suitable for engine oil environments and typical underhood temperatures. Easy to install: simply place the washer on the drain plug or sealing surface and tighten to the manufacturer's specification. Costeffective pack: 10 pieces per pack ensures you have replacements on hand for multiple maintenance intervals. Standardized size: designed for applications requiring a 13x18x2 mm copper washer (inner 13 mm, outer 18 mm, thickness 2 mm). Key attributes Material: Copper (solid gasket) Size: 13x18x2 mm (inner diameter 13 mm, outer diameter 18 mm, thickness 2 mm) Function: Sump oil seal and drain plug gasket Compatibility: Suitable for applications that call for 13x18x2 mm copper washers in oil sump drains and similar sealing points Applications and use cases Automotive engine oil drain plug seals: the washer during oil changes to ensure a proper seal. Motorcycle or ATV engine sump drain plugs: reliable sealing for mid to temperature oil environments. Small engines and equipment: lawn mowers, generators, and other machinery that use a drain plug with a 13x18x2 mm copper washer Usage notes for each service: copper washers deform to form a seal and are typically not reusable after removal. Verify fit: confirm that your drain plug and sealing surface require a 13x18x2 mm copper washer before use.