link -> JeuNaturel wooden tuba mouthpiece 4B ergonomic rim jeunaturel.com Wooden tuba mouthpiece 4B ergonomic rim This mouthpiece produces an full, warm tone and has a strong projection. The ergonomic rim is designed to follow the shape of your lips, it provides great comfort and will improve your high register and your agility to move through harmonics. Cup width 30,50mm 1,201 inches (denis wick 4, bach 25, JK T8, yamaha 64 size) depth 31,00mm 1.220inches throat 8,40mm 0,331inches If the specifications of this model does not suit you ,you can ask for your own custom model to be made .The price will be the same and every sizes and specifications are possible for all brass instruments. Made from beech wood , an hard wood that have a very good mecanic resistance and provides great acoustic transmission ,the grain is fine and gives smooth surfaces . Wooden mouthpieces gives a mellower , more velvety timbre than the brass ones and the lip comfort is improved by the pleasant contact of the wood and the fact that it is nourished by a balm that hydrates your lips as you play .The touch feels softer and less slippery than a plated brass ,that improves the precision of your lip moves and gives you a better support ,therefore a better endurance. The whole mouthpiece has been tempered at hot temperature in beewax ,this protects and raincoats the wood deep inside , then on the surface a balm is applied to give you extra comfort . Your mouthpiece comes with a tube of balm made from beewax and almond oil, it is designed to keep the surface of your mouthpiece well waxed . It also comes with a pouch for transport and a leaflet that explains how to maintain your mouthpiece. Handmade in france. Don't hesitate to ask questions if you need .