door hinge 1.ISO9002-2000 2."CE"certification 3."UL" certification. door hinge:Our main products are Commericial Hinges, Square Hinges with loose pin, Round-Corner Hinges. Ball Bearing Hinges, Flag Hinges and other common hinges, suuh as Light Hinges. "H"Hinges, "T"Hinges, Spring Hinges. Other Building hardware's are also available, like lasps&Staples, Tower Bolts, Hooks&Eyes, Door Pulls, Shelf ...