... Touch Screen Marking Machine (set include: marking machine, 3.5" LCDcontroller, 2 marking pins) CNC Automatic 3.5" LCD Touch Screen ... ,automotive chassis, engine, mechanical part, machine tool, metal pipe, gear, pump body, valve, various hardness plastic products, hardware ... Marked Samples Major partsDesk top marking machine, 3.5" LCD touch screen controller marking controller SparesAir pressure valve ...