This model fits a bass trombone with a detachable bell, with or without rotary valves.

The bell, with a maximum size of 10.5 inches, is stowed under a foam bell protector.

The instrument's body is secured by a velcro belt and the slide is secured to the lid.

There is space for accessories in an interior compartment or in the exterior detachable sheet music bag.

The case includes:

• 2 backpack straps

• 1 shoulder strap

• 1 mouthpiece pouch for three mouthpieces

• 1 pouch for 2 leadpipes

• 1 foam protector bell

• 1 identification tag

Structure: Made of fiberglass or carbon fiber.

Exterior: Made of nylon or leather, in your choice of Marcus Bonna fabric(s).

Don't see the colors you like here? Check out the Marcus Bonna Options page.

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Marcus Bonna cases have been an extremely popular choice for brass players since 1991. All MB cases are lightweight, compact, and durable. Fiberglass (or carbon fiber) shell, nylon (or leather) exterior. High-quality stitching and components. Handmade in Brazil.

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!