door floor spring, floor hinge 1) 500,000 times open/close tests. 2)Capacity ... door floor spring, mab floor hinge, spring closer, door closer, ground hinge,ground spingiron body+SS304 cover, the cover can be PSS & ... -1000mm and door weight of 100-120kg.The door can be opened to Max.135 degreees and closing effect is ... with double section adjustment. V-73 floor spring, similar to mab type, floor hinge