Made of heavy duty stainless steel with high precision, high strength, resistance to breakage, deformation and rust. The anti-rust treated surface of the door hinges ensures good corrosion resistance, sturdiness and durability. Under the effect of lubricated ball bearings, there is no noise when opening or closing the doors. Ball bearing door hinges have always been popular due to their smooth operation, durability, long-lasting design and ability to withstand heavier loads than standard hinges. Note: The data are all measured manually, please allow 1-3cm error due to differences in light and display, there may be some color differences, please refer to the actual item received.