<Material>-Zinc alloy embryo + aluminum alloy core. Coated with matte black finish. Hidden hinges for doors are made of solid zinc alloy by precision die casting. It is durable, corrosion resistant and has a long service life.
<Hidden Design>-Heavy-duty 180 degree Hidden hinges meet ANSI/BHMA standards, perfect for any commercial or intensively used door, including wooden doors, flush doors, metal doors, fireproof doors, noise isolation doors, security doors, etc.
<APPLICATION >- Our invisible hinge is suitable for all kinds of doors such as wooden doors, swing doors, aluminum doors, fire doors, smoke doors, soundproof doors, anti-theft doors, etc.