Stainless Steel Door Hinges, 4.5" X 4.5" Square - Nrp Hinge, Commercial Ball Bearing Door Hinge manufacturer / supplier in China, offering Commercial Ball Bearing Stainless Steel Door Hinges, 4.5" X 4.5" Square - NRP, 3.5X3X2.0 Steel Door Hinge with 6mm Pin, 3X2.5X2 Polished Steel Door Hinge and so on.