300 PCS Copper Sealing Rings Assortment Set, 12 Sizes Copper Metric Flat Sealing Washers Kit, Sump Plug Gasket Crush Washer Assortment, M5 M6 M8 M10 M12 M14 M16 M20

الوصف

🔧 Upgrade your toolkit with copper precision that lasts!

This 300-piece copper sealing ring assortment offers 12 metric sizes of flat washers made from high-quality red copper, delivering superior heat resistance, corrosion protection, and electrical conductivity. Ideal for enhancing bolt and nut durability across automotive, marine, electrical, and household projects, all neatly organized in a portable case for professional convenience.