100C - .240 Throat
The 100C is an excellent choice for a player who wants a shallow C cup for jazz or lead trombone, but who needs a larger diameter than a Bach 7C. The 100C is most similar to a Bach 6.75C. ID = 1.0 inch (25.4 mm). Throat = .240 inches (6.096mm), standard for most players.
100C - .250 Throat
The 100C is an excellent choice for a player who wants a shallow C cup for jazz or lead trombone, but who needs a larger diameter than a Bach 7C. The 100C is most similar to a Bach 6.75C. ID = 1.0 inch (25.4 mm). Throat = .250 inches (6.35mm) for strong players wanting less resistance.
100AL
The 100AL is similar in size and playing characteristics to a Bach 6-1/2AL or Yamaha 48S. It bridges the gap between the smaller, shallower 98C and the full sizes symphonic 101GS or 101G. The 100AL has an ID of 1.00 inches and a .270 (.686mm) throat.
100GS
The 100GS is similar in size and playing characteristics to a Wick 6BS. The 100GS has an ID of 1.00 inches, a .270 (.686mm) throat, and is available with a small or large shank. It can be compared to a Bach 5GS with a slightly smaller diameter, or to a Bach 6-1/2AL with a slightly deeper cup. The 100GS works equally well as a trombone or baritone mouthpiece.