Fiber Optic Light Source Diaphragm, Light Switch, to fit A-dec® Century Plus®; Pkg of 5 (A-dec® #75.0911.01) d in package of 5 A-dec® and Century Plus® 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.