1. copper water impeller 2. 35 years casting experiences 3. CNC, all types of laths 4. OEM 5.ISO9001,export entitlement water impeller1 ... , milling machine, drilling machine, numerical lathe, all types of lathe.4. Surface finish process: polishing, sand blasting, heat treatment, painting, powder ... gladly to service you, our skype:donytrade High quality 3 inch water impeller