The LTC-C model comes with a 33.5 rim size. This mouthpiece will give you a full sound with strong core. very clean articulation and the ability to play both loud and soft easily. highly recommended for orchestral and larger ensemble playing.
The LTC-F model cones with a smaller rim than LTCC, 32.5mm. LTCF was designed to be a all-round mouthpiece on piston F tuba. It will get you the high range you want without losing the power in the lower range. Flexibility is also one of it's strengths thanks to the sharp inner rim shape.
