1.Aerophone Mouthpiece Designed for Roland AE-01/01C AE-05/05C AE-20 AE-30. 2.It can prevent air leaking effectively when we are blowing into this mouthpiece, and it can obviously keep from our drooling at the same time. 3.It is labor-saving when we are playing our Aerophone,because of structure of these mouthpieces are soft. 4.The shape of aerophone Mouthpiece is suitable for the great majority of players. 5. It is softer and easier to bite than the original mouthpiece, and the different colors we offer to choose from . 6.The silicone mouthpiece is made in medical grade.