Features: Pressure reducing valves for horn mouthpieces, pressure adjustment, correction of blowing, good embouchure and breath, in order to progress towards professionalism. Pressure size adjustment, and can be adjusted according to the proficiency, so as to achieve the mouthpiece to save effort, more accurate and better sound. Golden/silver plated round horn mouthpiece with pressure reducing valves, the main purpose is to adjust the breath and correct wrong blowing, with the right way to play the right way of course. The mouthpiece is more effortless, and it is made by quality CNCcutting brass material, and with good precision cup mouthpiece are designed with care. Your satisfaction is our priority, please to purchase our product at ease. If you are not satisfied with our product or have any questions, please to contact our. Specifications: Material: Brass Color: Golden/Silver Package Weight: approx.138g Size: approx.8.7x2.7cm/3.42x1.06in (More Size Detail, Please See Photo.) Package Includes: 1Pc Pressure Reducing Valves for Horn note: Please allow 1-2cm error due to manual measurement. Please make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!