Valve Stem, to fit A-dec® Century® II Block, w/Water Retraction (A-dec® #29.0835.00) Pkg-1 ea Fits Century® II control block (with water retraction) 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.