... sturdy,durable reliable performance 300x250x40mm SD3025S CNC Engraver for advertising stamps ptocrssingproduct: SD3025Sproduct information:1.Integral cast ... , sturdy, durable, reliable performance, reasonable price, suitable for letters, images engraving on copper, aluminum products, any ... copper seals, making on the working piece, copper electrodes, punching molds and thermos dies processing in high ...