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 ... spring&oil.500,000 starting times guaranty.suitable for double swing door Width of 800 X 1000mm and door weight of 130-180kg.The door ...