Bob Birch Signature Trumpet Top (Silver Plated, Hard Rubber, Lexan, or White Delrin Plastic)

Item# bobbirch-top

Product Description

Inside diameter: 0.680"
Outside diameter: 1.090"
Medium-deep bowl
Bore size #23

This is similar to our 2MD, but with more girth at the bottom of the cup and a more pronounced inside bite.