1. brass fittings for pipe, hose 2.cnc parts according to customers' drawings 3.surface: as required ... design or drawings. 1. Material Available: Copper, Brass, Aluminum, Stainless Steel, Steel alloy, etc.2. Specification: OEM, according to customers' drawing or ... oxide etc.7. QC 1) Technicians self-check in production 2) Engineer spot check in production 3) QC inspects after mass ...