1.aluminum fittings, parts 2.OEM as customer required 3.surface: plating ... customer's design or drawings. 1. Material Available: Copper, Brass, Aluminum, Stainless Steel, Steel alloy, etc.2. Specification: OEM, according to ... , tapping drilling machine etc.6. Surface Treatment: Plating, anodizing, black oxide etc.7. QC 1) Technicians self-check in production 2 ...