1.OEM and ODM plastic or metal 2.Best quality and fast lead time 3.Profession method ... UHMW etc) ♦ Aluminum (different grade),metal,brass ,copper3.surface treatment for prototypes painting,anodizing,electroplating,brushed,sandblasting,printing,transpartent,rubber,paint ... depends on the size and material of the products .For products with special surface treatment,like painting,silk-screen printing ...