Pickett Blackburn Mouthpiece Top - AcrylicWe only hold Crystal Clear in stock with #27: 0. 1440" Standard backbore, call or email to order any other acrylic colours. Experience the benefit of Pickett Brass mouthpiece tops with your backbore. Offered in silver and gold plating. Also available in Acrylic! With design consulting by world class trumpeter Vince DiMartino our rims and cups offer optimum flexibility & consistent, precise articulations. Choose your own width, depth, and throat sizes.