A. This door closer is a discreet and useful addition to your door. This simple door closer allows the automatic closing of interior doors up to 50 kg. The main body of the soft door closer is hidden inside the door leaf and door frame. B. An automatic door closer could help keep you and your loved ones safe. This door spring will keep your front door closed automatically to prevent thieves from entering. This automatic door closer could be beneficial for peace of mind, especially if many people are entering and leaving your property. 140.5*25*2.5mm C. This door closer is hand-free and can therefore be used on left and right doors. Soft closing door hinges have a wide range of applications. Whether used to keep your living room door closed to maintain heat or used for commercial purposes, these soft-close hinges will work well and smoothly. D. The data are manual measurement, please allow a 1-3cm error, due to the differences between the light and the display, there will be a certain color difference, the specific received in kind prevail.