... .perforated metal mesh 2.hole size:round,square,triangle 3.Mesh Thickness:0.01 ... railway and bridges.Opening: in the shape of round ,square,diamond, hexagonal or special shape.Use:carbon steel perforated ... Hole Pattern: holes, square hole, lozenge holes, round hole, hexagonal hole, the cross hole, triangle holes, ... long round hole, long waist hole, the plum flower hole ...