Expanded metal mesh also called diamond hole wire mesh,metal expand net, is made of metal plate or rolls by punching and expanding.There are two kind of expanded metal mesh,the first one is raised mesh which is the most commonly mesh ;the other kind is flatten mesh which is is produced after flattening the raised mesh. Expanded metal mesh has smooth and beautiful surface and high strength.After different surface treatments, it will have higher corrosion resistance and colorful appearance.