Features: Brand new and high quality. Eliminates cavity sound, increases sound thickness, and reduces keyboard resonance. Approximately 3.5mm thickness between the installation and the PCB and steel plate; the steel plate and PCB are used for clamping, no glue is required, and the light position is not affected. Fills the entire keyboard, the sound is thicker, and the resonance from the plastic keyboard and cavity sound are eliminated. This switch sound dampening plate is placed between the keyboard's circuit board (PCB) and the positioning plate. A must-have for keyboard enthusiasts to DIY customize your keyboard. These keyboard foam dampers are made of soft foam rubber material, with a highly effective noise reduction effect, and will not damage your PCB board. Specifications: Size: about 43 x 12.1 cm/16.93 x 4.76 inches Material: Foam Rubber Quantity: 2 pieces Suitable for: 108-layout Mechanical Keyboard Color: Black Thickness: 3.5mm Please Note: Please allow slight errors due to manual measurement. Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Package Includes: 2 pcs x Switch Sound Dampeners