About this item Material: These flap hinges are made of zinc alloy, which surface is smooth and shiny. Size: 30*78mm (length and width); Hole distance: 10mm and 17mm; Aperture: 5mm. Features: Strong and durable, these hinges have high hardness, wear resistance, corrosion resistance and long service life.Flexible Smooth and quiet to open or close the table surface, effortless. Application: These hinges are suitable for many surfaces such as table top, computer desk, sewing machine, windows, doors and folding table, extension table, cabinet, etc. Package includes: You will get 4 pieces zinc alloy flap hinges. (This product does not contain screws) Note: The data are all manually measured, please allow 1-3cm error, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail.