... years of die casting experience 2: ISO 9001 Certification 3: OEM Service 4:Accept customized view: Ningbo Surely Metal Technology ... Treatment: chrome plating, sandblasting, painting , anodizing, powder coating, electrophoresis.3) Suitable for various industries: auto, machine, valve, pneumatic , etc.4 ... any question on our production Aluminum die casting home heater parts/connecting tube for heater