30 Piece Solid Copper Sump Plug Washer Set — Brand new, high quality Key benefits Reliable sealing: Solid copper washers provide a tight seal for sump/drain plugs and similar fittings, helping prevent leaks during operation and after maintenance. High temperature and corrosion resistance: Designed to withstand elevated temperatures and resist corrosion in oil, water, fuel and hydraulic environments. Good electrical and thermal conductivity: Copper material maintains conductivity where metal-to-metal contact and heat transfer are required. Bulk quantity for service intervals: 30 washers included so you can replace washers on multiple vehicles or retain spares for routine maintenance. What it does Forms a dependable crush/seal surface between plug and mating component to minimize fluid leakage. Works on fittings where both sealing and conductivity are beneficial, such as drain plugs and fluid connections. Material and performance Material: Solid copper Performance attributes: High temperature resistance, corrosion resistance, ideal electrical and thermal conductivity Compatibility and typical uses Specifically intended for sump/drain plugs and similar fittings; suitable for oil drain plugs, water, fuel and hydraulic connections. Practical scenarios: Automotive oil change: replace the sump plug washer each service to ensure a proper seal on the oil pan drain plug. Small engine or motorcycle maintenance: use on fuel or oil drain fittings to prevent leaks and maintain reliable contact. Hydraulic or marine systems: useful for water, fuel or hydraulic connections where corrosion resistance and conductivity are needed. What you receive 30 solid copper sump plug washers, brand new and ready for installation. Usage note Inspect mating surfaces and replace the washer when deformed or damaged to maintain a proper seal.