... durability style engineered for school ,house ,factory 1.profile:aluminium alloy6063-T5,powder coating (or anodizing) ,,wall thickness: ... pressure,Dustproof,Antifogging,AirtightWith so many good character,Xinjinda window and door can keep room clean,safe, sanitary, ... can prevent outdoor noise effectively.After surface processing, the window and door have strong weatherability, ageing resistance,and high ...