... PVC and other sheet materials.OUR PERFORATED METAL DETAILS:Materials: ... Perforated Metal hole shape: Round, Square, Long round, Triangle, Diamond, Oval, scale hole, hexagonal hole, plum blossom and so on.Round hole ... high-grade sound box, decoration, the seating for children, baskets, etc.Perforated ... perforated metal manufacturer,so we think our price will be competitive,and we could provice good quality ...