Door Buffers are a special system designed to slow down the closing action of any door Very easy to install, No Experience Needed, Buffer makes door Slow down and Mute effect, when closing the door you need to install Hinges (Hinge is NOT Included in package) Really Sturdy and durable Silicon Gel Pad, Slowly Closing Performance Protects your doors from slamming More StrongS pring, Reduce Noise from Kitchen Cabinet, Bathroom, Bedroom, Cupboards and Doors Each Buffer Contains 2 screws, if the door is heavier than 8kg. You may need 2 or more dampers. Package Includes: 30 x Door Buffer(15grey 、15White) 60 x Screw Note: It does not include other things, the color is based on the first picture, and the other pictures only show the effect Due to the differences between different monitors, the picture may not reflect the actual color of the item. Due to manual measurement. Please allow deviation. Thanks!