Material: low-carbon steel plate, stainless steel plate, aluminum stannum, aluminum magnesia alloy stannum.

Manufacture and characteristics: It is made by punching. The characteristics are bend-resisting, aging-resisting, not easily to rust, wide uses. The surface is plain, smooth and practical.

Uses: It is used to filter in the car internal-combustion engine; mine, medication and food screening; indoor sound insulation and aeration of grain depot.