our H-220-B floor spring is the perfect choice for all kinds of residential doors. High quality housing hardware Our floor springs are safe. In addition, our floor spring ensures the normal use of the door, parts are always changed. Easy installation: Each of our floor springs comes with detailed installation instructions, including every suitable part, saving you time and facilitating quick installation without delay in use. Our H-2800 floor spring do not need to go to the hardware store to run, simple operation, fast hand! Note: our floor spring is suitable for 0.9 meters wide, 2.2 meters high within all kinds of copper doors, glass doors, KFC doors, please choose according to your needs for you!.syi