No sliding bottom - the circular anti slip bottom design is used to keep your machine close to the ground and keep the machine in its position when the load shakes. Protect Your Floor - Made of rubber material to protect your floor from scratches, scratches, or any type of floor damage. Noise reduction - help reduce noise by 75%, and make your life calm and quiet. Wide Compatibility - These pads are generally compatible with most washer and dryer brands and models. Easy to install - no special tools required. Just put them in place. Specification: 4 pieces (see the drawing for the size, please confirm the size before purchasing)