*Color: Red *Specification: Hinge length: 0.79 inches (20mm). The specific dimensions are shown in the figure. Please confirm the size before purchasing. *This type of eyeglass arm hinge is easy to install and does not require professional knowledge to install on its own. *Glasses replacement hinges are suitable for most children's glasses with hinges. *Packaging: 1 pair of children's glasses arm hinges. -Material: Rubber -Specification: Hinge length: 0.79 inches (20mm). The specific dimensions are shown in the figure. Please confirm the size before purchasing. -Packaging list: 1 pair of children's glasses arm hinges. Kind reminder: Due to manual measurement, there may be slight errors in dimensions. Please read the size instructions carefully before purchasing. Contains small parts, please stay away from children under 3 years old.