1.Quality Materials - Our heavy duty pads are made from a blend of hard durometer rubbers allowing for long life and high performance.2. Convenient Design - Our improved design allows your washing machine or dryer to stand stable on any type of floor without the need for adhesive, thanks to the miniature grip pattern on the underside of each mat.3.Accessories Convenient - Keep appliances in place, they would also reduce noise, can greatly reduce the transmission of vibration from the washer or dryer to the floor.4.Increase the distance between appliance and floor to facilitate cleaning. These anti-vibration mats can be used on tile, concrete, wood, vinyl, linoleum, stone and other hard surface floors.5.Inner diameter: 4.7cm , height: 1.5 and 2.5 cm Vibration absorber for most brand washing machines and large appliances. Description Material: Rubber, plastic resin Color: gray Outer diameter :7cm Inside diameter:4.7cm Features Improved planing design : our improved design allows your washing machine or dryer to be stable on any type of floor without the need for adhesive, thanks to the miniature handle on the underside of each mat. Excellent vibration resistance: This set of 4 pads can significantly reduce the transmission of vibration from the washer or dryer to the floor. Advanced materials: Our heavy-duty liners are a n hardness rubber compound that provides a durable, high performance liner. Package Contents 4 x anti -vibration for washing machine