Toorx Professional Urethane Dumbbells , the single block steel construction makes the dumbbells very well balanced and extremely resistant. Suitable for professional use, they are made from a single block of steel, a feature that makes them extremely balanced and resistant. Urethane stands out for being a very high quality rubber, among its many advantages it also has the characteristic of not emitting bad odors. Available in sizes from 2 to 40 kg.