Rubber Block Plates, 2.0 x 2.0 x 0.4 inches (50 x 50 x 10 mm), 4 Pieces, Rubber Blocks, Square, Anti-Slip, Bumper, Scratch, Protection, Furniture, Vibration, Soundproofing, PST-104, Set of 4 Rubber Blocks (Hard and Durable Rubber Material) The material is made of hard rubber that can withstand heavy furniture and has excellent durability. *If you mind the smell of the rubber when using, please put it in a ventilated shade for a while, it will reduce the smell of the rubber. [For Absorbing Vibration of Audio Devices] The insulator is not only used for speakers, but also for CD players, record players, and power amplifiers. Use the insulator as a rubber plate to reduce vibration. (Furniture Height Adjustment) It can also be used for furniture such as tables and cabinets, and it can also be used to prevent scratches. In addition, it can be used in a variety of situations, such as preventing furniture from falling or slipping or protecting hardwood floors. Note: Due to the manufacturing process, there may be a slight error of around 0.04 inch (1 mm).