Opening length should be between 8mm and 9.5mm (0.3 inches to 0.37 inches) to a secure fit without falling off. Soft closing mechanism transforms self-closing hinges into soft-closing hinges, eliminating slamming doors and reducing noise. Constructed from quality iron and plastic for durability and reliable performance. Easy installation with a clip- that requires no screws or adjustments. Designed as a perfect retrofit for non-slow-closing hinges, allowing for a seamless upgrade of existing cabinets. This soft close cabinet door damper is an ideal solution for enhancing your cabinets. It ensures smooth and quiet closing, protecting both the cabinet and surrounding furniture from damage. The simple installation process allows you to upgrade your cabinets effortlessly, making it a practical addition to any home. Color: As Shown Material: Iron+Plastic Package Contents: 15 Pack Hinges Damper Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.