Features: The diameter of the joint is about 3cm/1.18inch, and the bells mouth of the clarinet is made of high-quality bakelite material, which is durable. The installation is convenient and fast, the structure is firm and stable, and the replacement effect is good, without affecting use effect of the instrument. The clarinet bells mouth adopts a compact design, which is small in size, light in weight, and easy to carry. Easy to blow, bright tone, with a bakelite and alloy bells mouth, with an external rigid hoop for shock and crack resistance. This is a great substitute and is perfect as a gift for your friend, family, and music enthusiasts. Specifications: Material: Bakelite Size: Approx.8x11.2cm/3.15x4.41inch Connector Diameter: Approx.3cm/1.18inch Package Includes: 1x Clarinet Bells Mouth note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item.