1. copper water impeller 2. 35 years casting experiences 3. CNC, all types of laths 4. OEM 5.ISO9001,export ... CAD, Solidwork, CAXA UG, CAD/CAM/CAE.3. Precision machining: CNC, milling machine, drilling machine, numerical lathe, all types of lathe.4. Surface ... will gladly to service you, our skype:donytrade High quality 3 inch water impeller