... Metal Prototypes, Design Service, Low Volume Production,Metal Prototypes Item NameLow Volume Production via Rapid Injection Molding and CNC and Cast UrethaneService we ... Vacuum casting(Silicon Mould) (For 5-150pcs)3: Low Volume Production (for 100 to 10,000 parts)4: Rapid Sheet Metal ... , Toy plane and etc. 8. and etc.... Low Volume Production via Rapid Injection Molding and CNC and Cast Urethane