It is divided into ordinary and bearing type, ordinary type mentioned above, focus on the bearing type. Bearing type material can be copper, stainless steel. Specifications: thickness 100X75 125X75 150X90 100X100 125X100 150X100 2.5mm, 3mm bearing two bearings, four bearings. From the consumption point of view, using copper bearing hinge more because of its styling, beautiful, affordable, and are equipped with screw.