High Quality: 4 sets of shock absorbers are made of high-quality rubber and environmentally friendly PP (polypropylene), which has excellent durability. The bottom layer is made of rubber with frictional, non-slip and soft properties. The dual design protects the floor from damage when it is moved, shaken or walked on. Anti-skid function: The shock absorber can reduce the noise caused by the instability of the washing machine or dryer. Significantly reduces vibration transfer from washer/dryer to floor, avoiding nicks, nicks and scuffs. Protect household appliances from scratches and protect your floors. Inner Diameter: 4.8cm; Height: 1.6+3.3cm; Suitable for shock absorbers of most brands of washing machines and large appliances. Secure equipment in place and reduce noise. EASY TO INSTALL: No tools or stickers required. Simply lift each corner of the machine and slide the shocks into place. Versatile: Each mat can be overlapped to meet different height requirements. Suitable for Washing Machine , Refrigerator, Trolley, Washer, Tumble Dryer and Sofa, Table, Bed and more Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.