Dimensions & Compatibility: Each hinge measures 22.5 mm in height and 10 mm in base diameter when folded. The opening gap between two unfolded hinges is 5.8 mm. Ensure compatibility with your project. Premium Material Construction: Crafted from high-quality polished brass, these hinges feature a shiny finish and offer durability and rust resistance. Their robust construction supports a reliable load-bearing capacity. Functional Design: These hinges provide a 180-degree opening angle, allowing smooth motion from 0 to 180 degrees. The concealed design ensures the hinges are not visible from either side, preserving the clean look of your project. Installation Made Simple: The package includes 8 brass barrel hinges with a roller rail design for smooth and quiet operation. Installation is easy—drill a hole and insert the hinge. Versatile Applications: Suitable for various small-scale projects such as jewelry boxes, folding tables, cabinet doors, and small furniture. Can be used with wood, plastic, and thick glass materials. Not intended for heavy-duty use. Color: As shown Material: Brass Package Contents: 8 x Barrel hinge Note: Light reflection and display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.