In the opinion of the Vandoren experts, the Vandoren SM812S+ A6S+ V16 Alto Saxophone Mouthpiece is one of the most played mouthpieces, in every style. The new S+ chamber is the next step in the evolution of the V16 alto mouthpiece. It offers a richer depth of sound while keeping the free-blowing nature and projection that characterize the V16 alto models. The S+ chamber accommodates more air providing the musician greater flexibility and a wider array of colors with which to work. The S+ chamber accommodates more air providing the musician greater flexibility and a wider array of colors with which to work.