Element largest open 105degrees, 90 degrees bidirectional position, cloesing speed is Two-stage,built-in ... withstanding weightS-220270*125*52mm1000*2100mm75-90kgElement largest open 105degrees, 90 degrees bidirectional position, cloesing speed is Two-stage,built-in ... that the using time is more than 200,000., floor spring floor hinge manufacturing factory