Aluminum profile doors and windows mainly include three aspects: Aluminum profile, glass and hardware. Owners often pay more attention to the thickness of aluminium profile and glass when choosing and purchasing products, but the requirements for hardware are not very high, which is incomplete. In fact, there are certain standards for aluminum alloy doors and windows in our country. The thickness, strength and oxide film of aluminium profiles used in high quality aluminium alloy doors and windows can generally meet the national standards, such as the relevant national requirements: the wall thickness of aluminium profiles for aluminium alloy doors and windows should not be less than 1.2 mm, and the oxide film thickness should reach 10 microns. And toughened glass is better than ordinary glass. If the safety and durability of doors and windows are considered, stainless steel hardware fittings (such as screw, hinge, handle, etc.) are better than aluminium fittings, and pulley is better to choose POM products, because these products have higher strength and wear resistance, smooth use process, and not easy to damage.