Replacement Brake Block for K&M 1499X Trombone Stand Cup
This part goes into the underside of the cup and acts as a brake that presses against the shaft. It keeps the cup from sliding downward. It is used in conjunction with a locking nut (item 123362) and knob (070878). Used on the K&M model 149/9, 14990, and14991 ("UMI" or "Conn-Selmer") trombone stand models. These models have fold-out, hinged flat metal stock legs. It is used in conjunction with a locking nut (item 123362) and knob (070878). See diagram.