AR Resonance Mouthpiece Backbore Medium Brass Trombone Euphonium Mouthpiece. 7.2mm bore in great condition as hardly used. I am selling another backbore and cup so I can combine postage if required. Please check my feedback and buy with total confidence saving £££s over the retail price of £80 plus. Non UK buyers please request shipping cost before paying. The material for this backbore is brass. The other AR items are in bronze. The box is not included.
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