1. The model, specifications, and performance of the selected hardware accessories should comply with the current national standards and relevant regulations, and match the selection of plastic steel doors and windows.

2. Double pulleys or rolling pulleys should be installed for sliding windows with a width exceeding 1 meter, or doors and windows with double glass installed.

3. The sliding hinge shall not be made of aluminum alloy material, but stainless steel material.

4. When installing hardware with fastening screws, a metal lining plate must be installed inside, and the thickness of the lining plate should be at least twice the pitch of the fastener. Do not fasten on plastic profiles or use non-metallic liners.

5. Hardware accessories should be installed last, and door and window locks, handles, etc. should be assembled after the window and door leaves are inserted into the frame, ensuring the correct position and flexible opening and closing.

6. After the installation of hardware stamping parts, attention should be paid to maintenance to prevent rust and corrosion. In daily use, it is necessary to close and open gently to prevent damage caused by hard closing and opening. Without any noise, we have the current nylon wheels. It not only makes no noise when pushed and pulled, but also is smoother, lighter, and has a service life no shorter than the various pulleys mentioned above. Make sure the doors and windows are functioning properly. To run smoothly, it is necessary to choose a high-quality pulley for the door and window. From the surface, the workmanship of inferior pulleys is relatively rough. Not smooth. Not flexible when sliding. Small and light.