ALEKO JL18F 3 Inch Welding Hinge For Gates Fences Doors Perfect for heavy duty door hinges, ramp gates or anywhere you need a heavy duty hinge. Weld-On application. Heavy Duty. Used for sliding door and so on. Easy installment, durable, high quality Material: Iron. Length: 80 MM (3 1/8 inch) Diameter: 18 MM (5/8 Inch)