17 years factory ISO 9001 & ISO 14000 8 sets punching machine the daily output is 1000 square meters Perforated metal :Material :stainless steel plate,low carbon steel plate, Aluminum Alloy plate,galvanized plate,PVC plate, cold rolled plate,hot rolled plate,copper plate, manganese steel plate,etc.Hole Patterns:round,square hole, diamond hole,long round hole,hexgonal hole, triangle hole, scale ...