Rim Diameters
* Rim diameters range from 1.26 inches (32 mm) to 1.32 inches (33.5 mm).
* Measured at .05 inches into the cup in the long, vertical axis of the oval.
* Named by the size in inches (1.28 inch rim is called a 28 rim).
Cup Depths
F Cup
![](https://cdn11.bigcommerce.com/s-blhtmcgm/product_images/uploaded_images/f-tuba-140.jpg)
* Similar to a PT65 cup
* Shallow, modified V shape
* Excellent balance of clarity and projection
* Even response in all registers and a round, full tone
* Shallow, modified V shape
* Excellent balance of clarity and projection
* Even response in all registers and a round, full tone
G Cup
![](https://cdn11.bigcommerce.com/s-blhtmcgm/product_images/uploaded_images/g-cup-140.jpg)
* Similar to the Schilke Geib, Bach 7, Bach 12, and Yamaha 67C4 mouthpieces
* Cup shape is a modified funnel, which is slightly more bowl shaped than a Helleberg style cup
* Sounds is less dark than a Helleberg cup, with a bit more projection
* Excellent choice for rotary valve tubas
* Cup shape is a modified funnel, which is slightly more bowl shaped than a Helleberg style cup
* Sounds is less dark than a Helleberg cup, with a bit more projection
* Excellent choice for rotary valve tubas
H Cup
![](https://cdn11.bigcommerce.com/s-blhtmcgm/product_images/uploaded_images/h-cup-140.jpg)
* Helleberg style cup similar to the Schilke Helleberg II, Conn Helleberg, and Laskey H series mouthpieces
* Deep funnel shape
* Dark, round sound that still has excellent projection when desired
* Deep funnel shape
* Dark, round sound that still has excellent projection when desired
D Cup
![](https://cdn11.bigcommerce.com/s-blhtmcgm/product_images/uploaded_images/d-cup-140.jpg)
* The Wedge D cup has a deep bowl shape similar to the PT50 and PT88 mouthpieces.
* In smaller diameter is an excellent choice for a player looking for the characteristics of a Bach 24AW on EEb tuba.
* In larger diameters produces a huge sound with a very even response in all registers.
* In smaller diameter is an excellent choice for a player looking for the characteristics of a Bach 24AW on EEb tuba.
* In larger diameters produces a huge sound with a very even response in all registers.
Shanks
* Are you uncertain about what size shank you need? Get all the information your need from our tuba shank guide.
Material Options
Brass
![](https://cdn11.bigcommerce.com/s-blhtmcgm/product_images/uploaded_images/sl-tuba.jpg)
Delrin
![](https://cdn11.bigcommerce.com/s-blhtmcgm/product_images/uploaded_images/del-tuba.jpg)
Acrylic
![](https://cdn11.bigcommerce.com/s-blhtmcgm/product_images/uploaded_images/ac-tuba.jpg)
For details about the chacacteristics of plastic mouthpieces visit our Brass vs Plastic page.