... :1.Materials : stainless steel plate ,low carbon steel plate,galvanized sheet plate, cold-rolled coil, hot ... 3.Hole Types : square hole, diamond hole, round hole, slotted holes, hexagonal hole, the hole, ... balcony, environmental protection desks ,chairs excellent decoration plate, protective cover, luxuriant sound box guard, food, ... my first attention ! galvanized round hole perforated metal sheet