Pickett Brass Trumpet Mouthpiece BackboresPicket Brass mouthpieces are designed and manufactured in house to ensure unsurpassed quality. Every mouthpiece is hand inspected for defects and polished with the highest level of care to maintain the precision, dimensions, and tolerances. With Pickett's modular system, you have the freedom to customize your own personal mouthpiece. Everything from the rim inner diameter, all the way down to the backbore, can be matched to your individual preference.