Item Type: Tenor Saxophone Tone Filter_x005f_x000D_Material: Silicone_x005f_x000D_Colour: Yellow 1Sax Tone Filter: Helps maintain proper back pressure to keep air flowing through all the keys while reducing the air blown out. 2Simpler Playing: With this tone filter, you will find your tenor saxophone playing much easier and more even, very practical. 3Pretty Design: The little yellow ring will also be a beautiful decoration on your sax, making you performance more attractive. 4Secure Material: Adopting high quality silicone material, very soft and will not damage the instrument, durable for long use. 5Easy to Install: Comes with a light and a compact size, the convenient installation can be quickly completed within minutes.