Copper has proved excellent uses as daily necessaries with the great corrosion resistance and process ability. Its value is high due to remarkable electrical conductivity, which is second only to silver. Copper is deoxidized and alloyed to intensify certain features of it and is used to manufacture products that satisfy the needs of each industry field. We produce and supply top quality plates and coils of copper, brass and zinc.

Wonilsa has the flexible manufacturing system to meet the demand trend of various products in small lots, keeping the quality management for each customer. Abiding by the Korean Industrial Standards(KS D 5201) and the international quality assurance system(ISO 9001:2000), we produce and supply the superior plates and coils of copper and brass, and zinc plates.