The GW 144 and 149 are similar to a Bach orchestral mouthpiece with a slightly flatter rim and modified throat, cup and backbore.

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Giddings & Webster 1.25 GW 144 Trumpet Mouthpiece Specifications:

• Rim Diameter: 17.04 mm, .671 in.
• Throat: 3.65 mm, .144 in.