... narrow frames 3,Material:Zinc-plated/Original Iron,Stainless Steel,mild stee welding hinge1,Premium Quality,Strong & Sleek ... : widely used in shipping, machinery, gates, machinery doors, barbecue pits, electrical boxes, boats, cabs, commercial fishing equipment, MCC ... purpose 2. Material: zinc-plated/original iron, stainless steel, low carbon steel , 3. Advantages: (1) Excellent and high quality ...