ALEKO JL33A 4 Inch Heavy Duty Gate 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 weld on hinges Material: Steel. Length: 100 MM Diameter: 25 mm