... effect,bi-layer protection,fasteness with 50 years used for construction,ornament and decoration, business, electric power, ... treatment, 3. national standard passed,extruded aluminium alloy for sliding door and window ADVANCE EQUIPMENTQuality products derive from ... our mould freethicknessMinimum 0.8mm for profile; 10-20um for oxidation film; 40-120um for powder coatUsagesWindows, doors, curtain ...