Top hinge,transform door closer,floor spring, floor hinge 500,000 times open/close tests. Capacity weight130- 180kg. transform door closer, top hinge, floor spring,floor hinge, spring closer, door closer, ground hinge,ground spingcan ... 130-180kg.The door can be opened to Max.105 degreees and closing effect is 90 degree with double section adjustment. floor spring, top closer