Krystal Urinal Deodorizer Blocks, 4-Ounce Block, Cherry Fragrance, 12 Blocks/Box (U04BX) Go to amazon.com Related posts Top 14 best urinal deodorizer FeatureInstantly eliminates odors.Para deodorizer lasts up to 30 days.Paradichlorobenzene block. DescriptionInstantly eliminates odors. Para deodorizer lasts up to 30 days.Paradichlorobenzene block.