HP Diaphragm for Valve, to fit A-dec® Century® Pac; Pkg of 10 Used in handpiece control valve Package of 10 (A-dec® #22.0770.00) (A-dec® #22.0774.01) A-dec® and Century® are a registered trademark of A-dec, Inc. DCI has no affiliation with A-dec and A-dec has not authorized DCI replacement parts to be used on or in connection with A-dec® products.