backun bb/a clarinet barrel moba grenadilla - standard fit 66mm backun the moba barrel produces an unmistakable, full-bodied, dark sound that makes it a favourite amongst orchestral players worldwide. with increased resistance and focus, and an unbelievable ease of articulation throughout the entire range of the clarinet, this barrel is a great option for artists wanting a darker tone. artists prefer this barrel for orchestral repertoire, whether playing in the section or as a featured soloist. standard fit backun, buffet, leblanc, selmer (usa, centered tone, 10g, series 9), yamaha, and most other model brands. most clarinet brands will be standard fit, but please note that handmade instruments or very old instruments may have sizing differences that can't be foreseen. selmer paris instruments not listed above (for the most part) have a slightly different socket depth, and you must be sure to order the selmer fit. generally, selmer fit uses increments that end in 0.5mm increments (ex. 65.5mm). if you're not sure, please contact us before ordering. standard plus special order same as above with larger bore for more free blowing feel selmer paris fit special order selmer paris fit (not including selmer usa, centered tone, 10g, series 9)