I used these to soundproof and vibration-proof my washing machine. Creating space helped with potential water leaks and also ventilated the area under the washing machine. I think it's a better measure than just placing the washing machine directly on the floor. I am selling these because I bought a new washing machine. I used them for about six months. Price is firm. Radius: 7cm Height: 3cm at the highest point, 2cm at the lowest point