The selection of hardware for door should base on the standard and the quality of the selected hardware. For example, the hardware and accessory which designed to fit with uPVC system should not need any modifications when installing them with German-Standard uPVC profile. The selected material should be very strong and trustable like stainless steel, zinc steel, or thick micron coated steel.

The hardware and accessory should be able to withstand the outside environment like non-corrosion and non-salt effect. The quantity of hardware and accessory usage is to be determined by the size, weight and the height of particular door.