describe:[High-quality double-layer design]Upper layer: PP (polypropylene) solid plastic, durable.Bottom layer: TPU rubber.Wear-resistant, non-slip, delicate and protective of the ground. It absorbs vibrations and noise when machine washed. Recommended for use in electrical merchandise with vibration and noise. Suppress vibration and forestall deflection.【Easy to wash lifting table】When there is a drain outlet below the bathing machine, area for the drain hose could be ensured. Lift home home equipment and furniture on the backside to circumvent direct contact with the ground, preserve moisture and the ground from damage, and make cleaning easy.Specification:Height:4CMInner diameter: 5CMDiameter:10CMSet contents:Anti-vibration pad set of four pieces.Notice:1 cm = 10 mm = 0.39 inchesPlease enable 1-3mm error thanks to guide measurement. Please ensure you don't intellect before bidding.Due to variations between assorted monitors, photos may not reflect the actual colour of the item. Thanks!