Backun Bb Mouthpiece O-Ring Set

This set of three replacement O-Rings fits Backun Signature Bb Clarinet Mouthpieces. Available in three sizes (small, medium and large), the O-Rings are self-lubricating, which reduces friction when assembling the clarinet. 

Note: All Backun Signature Series Mouthpieces come with medium-sized O-Rings installed, which fit a majority of clarinet barrel tenons.