Urinal Puck Blue DSL is comprised of bacterial cultures capable of degrading uric acid which is the leading cause of scaling and odors in urinals. Because these urinal pucks degrade odors naturally, this urinal puck is cost-efficient, saving money by reducing the frequency of urinal flushing. Urinal Puck Blue DSL has the added benefit of dispensing bacteria and water softening agents into the drains with each use and flush. Deodorizer Type: Urinal Block; Scent: Fresh; Color(s): Blue.