Yamaha tuba mouthpiece, model 67B4. With a shallow cup and large bore, it produces a clear tone across a wide range♪ Model Number: 67B4 Inner Rim Diameter: 32.06 Throat Diameter: 7.02 Due to the large inner rim diameter and shallow cup, articulation is easy and the tone is bright. It's easy to play high notes, and the low range is extremely clear, making it ideal for F tubas. I purchased this used, but I'm selling it because I no longer need it. It shows signs of use, with minor scratches on the shank and rim, but there are no dents, and overall it's in reasonably good condition. Please check the photos and understand that this is a used item. No claims and no returns accepted. Feel free to comment if you would like additional photos or have any questions! Instant purchase is also welcome!