Aluminium tube with different surface treatments Alloy: 6061, 6063, 6005,6463 etc. Temper:T5,T6 Surface treatment;anodized, polished We are professional manufacturer in aluminium profiles for windows,doors, and curtain wall. Up to now, we have 16 extrusion lines, with all kinds surface treatments as mill finish, anodized, powder coating, electrophoresis, polishing, wood grainetc. Products: ...