... 105degrees, 90 degrees bidirectional position, cloesing speed is Two-stage,built-in reducing valve. Model NO.Outer size of floor springreference ... size of door plankMax withstanding weightS-220270*125*52mm1000*2100mm75-90kgElement largest open 105degrees, 90 degrees bidirectional ... that the using time is more than 200,000., floor spring floor hinge manufacturing factory