Pleated will fix on any French window and balcony. Pleated will Installed on maximum size of 10 to 15 feet. Frame made up a strong aluminum profile. sun slits narrow kitchen windows, balcony .It Retrieves 90% natural light and fresh air. We provide powder coated frame or anodized to match of windows. Mess id made from vinyl coating This system in install on your existing window the existing window will not affect or disturb while open or close. Easy to installation (front or back side fixing possible).