4 Inch Invisible Door Spring Hinge | Automatic Self-Closing Stainless Steel Hinge for Wooden Doors | Heavy Duty 304 Steel, Brushed Black, Supports 77lbs | 90° Positioning, Fire Rated, Interior

4 Inch Invisible Door Spring Hinge | Automatic Self-Closing Stainless Steel Hinge for Wooden Doors | Heavy Duty 304 Steel, Brushed Black, Supports 77lbs | 90° Positioning, Fire Rated, Interior
The 4 Inch Invisible Door Spring Hinge is a multifunctional automatic door closing hinge designed for smooth and reliable door operation. Crafted from durable 304 stainless steel with a built-in self-closing spring, this hinge features a brushed and black-plated finish that resists rust and high temperatures. It supports doors weighing up to 35kg (77lbs) and ensures the door closes automatically at a 90-degree position, eliminating the need to manually close doors in homes, offices, hospitals, schools, or commercial spaces. Tested to meet EU standards including EN1935:2002 with nearly 200,000 cycles, fire resistance, overload, and fatigue tests, it is suitable for both interior and exterior doors and fits left or right-hand installations. The package includes one self-closing door hinge, with slight measurement deviations possible due to manual sizing and color variations depending on display settings. This hinge is ideal for frequently used doors, providing a convenient and professional solution for door management.