Copper filter disc, also called copper wire mesh filter disc, can be classified into phosphor bronze filter disc and brass filter disc. Brass filter disc is made of brass wire. Brass, an alloy of copper and zinc, provides brass wire better abrasion resistance, better corrosion resistance and lower electrical conductivity. Bronze filter disc is made of bronze wire. Bronze, an alloy of copper and tin, provides bronze wire high hardness, high molding capacity, wear resistance, corrosion resistance, bright color and so on.