... ; 2.Aperture :3 mm - 10 mm ; 3.holes:various 4.anti-corrosion 5.not out of shape About us :We An ... perforated metal, etc. 3.Hole Types : square hole, diamond hole, round hole, slotted holes, hexagonal hole, the hole, triangle hole, long ... get my first attention ! beautiful/decorative perforated metal for bank (anti-corrosion)