... CNC high speed router / engraver. and the material for the sample is copper. and our high speed ... CNC routers are both able to process the metal material and non-material . such as the iron , copper , aluminum , pvc ... , wood , acrylic and so on . the Siwei CNC high speed router / engravers are wide application ... copper, aluminum plates ect. as for the details , pls check the Alibba Website .