Marcus Bonna Fiberglass Bell Protector with Carbon Fiber Layer


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We recommend buying a bell protector to accompany the softer Marcus Bonna cases, such as the backpack bag, MB-S1, or MB-S2.

The bell protectors come in Small, Medium, or Large. If you are unsure which size your bell will need, please call us at 817-993-6400 ex. 1 and a sales associate will test it on a similar bell.


Small – 12 cm (4.72 in)

Medium – 12.5 cm (4.92 in)

Large – 13 cm (5.12 in)

*Raw brass, polished brass, and unlacquered instruments and mouthpieces will tarnish quickly and may not arrive with a flawless finish. This is a natural property of raw brass, which will develop a rich golden-brown patina over time.

:warning: California residents: See Prop 65 warning.
All brass instruments and brass instrument mouthpieces may contain lead, which is known to cause cancer and reproductive harm. –