... door/swing door Description:(1) Materials: aluminum alloy frame, 6063-T5 Surface Treatment: anodized, electrophoresis, powder coating, PVDF, ... Modern type, heat-insulated, water-proof, air-resistant. Aluminum alloy profile (1),multiple cavity design, good structural stability, ... 30-60% energy.expansion coefficient is close to aluminum alloy, the block processing accordingto European standards, so the ...