... for advertising stamps ptocrssingproduct: SD3025Sproduct information:1.Integral cast-iron frame. Rolling ball screw from Germany. Configured 800W inverter- ... operation, sturdy, durable, reliable performance, reasonable price, suitable for letters, images engraving on copper, aluminum products, any copper ... .Vacuum System(optional) 300x250x40mm SD3025S CNC Engraver for advertising stamps ptocrssing