Thein Brass handcrafts trumpets, trombones, and other brass instruments in Bremen, Germany. Most models are offered with a wide range of bells, leadpipes, metals, and finishes, so players can tailor the instrument to their sound.

Thein makes its own mouthpieces in Bremen to match its instruments, and this listing covers its small shank models for alto and jazz trombone.

The D1AW has a cup diameter like a Bach 6-1/2 with a wide backbore, which Thein describes as excellent in the high register. Thein recommends it for its New York alto trombone and its bass trumpets. The A11C is Thein's recommendation for both the New York alto and the Maxim jazz trombone, and the E-RS is also listed as a recommendation for the Maxim. The Kazehaya is also available. See the Thein mouthpiece guide for Thein's full lineup.

• Models: A11C, D1AW, E-RS, Kazehaya
• D1AW: Cup diameter like a Bach 6-1/2, wide backbore
• Recommended for: Thein New York alto (A11C, D1AW) and Maxim jazz trombone (A11C, E-RS)
• Made in: Germany

Not sure which setup is right for you? Book a free virtual instrument consultation with our team.

WARNING: Brass instruments and their accessories can expose you to chemicals including Lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm, and Nickel, which is known to the State of California to cause cancer. For more information go to:

www.P65Warnings.ca.gov

Most new instruments and accessories over $75 are eligible for free shipping to the continental US.

Thein instruments, tubas, and pre-owned instruments are excluded from free shipping.

Click here for our full shipping policy.

Most products sold in the United States receive a 15-day return policy that starts on the day the customer receives their order. The customer is responsible for the cost of initial and return shipping, except in the case of new French horns, trumpets, and trombones, which will receive free return shipping from 48 US states. There will be a $5 cleaning fee for each returned mouthpiece.

Some product categories are ineligible for return, which include special orders, sheet music, consumables such as lubricants or cleaning snakes, and personal items such as clothing or face masks.

Unfortunately, as of May 12, 2025, we can no longer offer returns, exchanges, or refunds to international customers due to the tariff situation. We hope to restore international returns soon.

See the policy links at the bottom of our website for more information.

Click here to request a return.

Any product labelled "Special Order" is a final sale, no refunds or exchanges. Likewise, any product that has been customized at the customer's request can no longer be returned.

Click here for more information on special orders. If you want it, we will try our best to get it to you!