... 90°-Angle(2)45° -AngleC)Suface Treatment(1). Anodizing:(Clear,silver,golden,bronze,other muiticolar.)(2). Electrophoresis(3). Powder,polishing,PVDF ... ,Sandblasting,etcStandard: GB/75237-2004,Q/320281/PDWD-2008Certification: ISO9001:2008Specifications: According to your design drawings ... we are very glad to offer you more details. Silver extruded solar aluminum frame