... ,ISO9001 and ISO/TS16949 passed 4,manufacturer 4-1/2" x 4-1/2" x 3.4mm door Hinge Product Name 4-1/2" x 4-1/2" x 3.4mm door HingeMaterial ... clients' require;FinishZinc Plated, chrome plated, powder coating, hot-dip galvanized, electrophoresis or others;Surface treatmentPolishing, zinc plating, nickel plating or ...