Progressive Flexibilities for Brass – Treble Clef Edition sbelck July 19, 2020February 13, 2022 Comments $39.99 The latest offering from Lip Slur World Headquarters. This is not your grandfather’s sarcastic lip slur book! Book is $34.99 Shipping and Handling is $5 in the U.S. $39.99 Progressive Flexibilities for Brass - Treble Clef Edition quantity Add to cart