... : chrome plating, sandblasting, painting , anodizing, powder coating, electrophoresis.3) Suitable for various industries: auto, machine, valve, pneumatic , etc.4) Whole process ... .Certificated Approval : QC Team :A QC team with more than 20 professional and technical personnel. To ensure 100% products checking.Material ... there is any question on our production Aluminum die casting gas cylinder cover