Metal wire mesh for speakers. Block oxide or painting surface. 1. Stamping steel parts, mesh for speakers.2. Size: Dia. 620mm x 3 mm(H) ... machines; milling machines etc. Also have good die-casting brother factory, the biggest die-casting machine is 350T.Material: The usage ... , such as Stainless steel, Aluminum, Brass, Bronze. SGCC, SECC, and SPCC, etc. If you have special request of material. Please ...