Thank you for viewing. I purchased this new, but ended up not using it. It's unopened and unused. Quoted from the Amazon website: 【Washing Machine Height Adjustment/Soundproofing/Vibration-Damping Rubber Mat (45mm)】Made of rubber, it has vibration-damping and soundproofing effects. 【Height Adjustment by Stacking】This product can be raised up to 90mm by stacking two mats. 【Material that doesn't easily transfer color】Safe to place directly on flooring. 【For Washing Machines with Under-Drainage】Provides space for the drain hose by raising the height. Effective in preventing drain blockage errors. Also makes cleaning easier. Thank you for your consideration.