The ACB AOS backbore was developed specifically with the C trumpet in mind, but will still fit and work great in a Bb trumpet. The heavier backbore helps to add some warmth in the sound and some security in the slotting. 

Each backbore has some insertion marks, but is otherwise in amazing condition and ready for a new home! 

All of our backbores/tops are on Warburton threads, making them compatible with the majority of the modern market.

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ConditionMint (Used)
Mint items are in essentially new original condition but have been opened or played.Learn more
Brand
Model
  • AOS "Heavier" Trumpet Backbore
Finish
  • Silver Plate
Made In
  • United States

Product safety information may be available here.

Austin Custom Brass

Kansas City, MO, United States
Joined Reverb:2016

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