Haida Door Control Co., Ltd.

Virtually invisible, but fully functional. Floor springs ensure that your door will close automatically when opened. They are as good as overhead closers in terms of convenience and safety. All individual components are built into the floor or the door. Floor springs are ideal when the door should be designed to be as inconspicuous as possible - whether in an elegant portal or in an upscale store facility. For semi-circular arches or fully glazed doors, they master this particular challenge as a single system - and with flair. Features A. Produce according to EN1154 standard & ISO9001 B. Double speed adjustment, ball bearing inside,closing smoothly C. Italy type design , popular in Middle East Asia, West Asia, South America D. 500,000cycles test without damage E. Applicable for glass door, wooden door, aluminum door and frame door F. Different Cam for Optional(Germany, Italy, Brazil, Japan and so on)
link:https://www.heinda-cn.com/floor-spring/single-cylinder-floor-spring/factory-price-floor-spring-for-glass-wood.html