The GR 67 Series cup diameter is similar to a conventional 1 1/2 to 1 1/4 diameter.
The 67L is a very popular choice for 1 1/2C players looking for more core in their sound with more secure articulations in a more efficient design.
Classic Blank is standard. Symphonic Blank is standard on the C** and C models.
Classic Blank is standard on the C-T and B-T Models.
G Rim Models - G67LX, G67L - Same cups as their standard counterparts but with the slightly wider G Rim.
Wonderful mouthpiece at a great price. I absolutely love the GR brand and wouldn’t play on anything else. When a person is able to, you simply must invest money into a quality horn and mouthpiece; GR brand mouthpieces are of the highest caliber.