Big D Industries Para Urinal Screen, Lasts 30 Days, White, Cherry Fragrance, 12/Box - BGD930Made of 100% pure paradichlorobenzene and Big D deodorants. Para is the classic, highly effective and economical deodorizer. Air soluble, so performance is not affected by water. Individually wrapped for freshness. Protects the urinal from debris while deodorizing. Flushes will not affect the life of the block. Made of 100% pure paradichlorobenzene and Big D deodorants. Para is the classic, highly effective and economical deodorizer. Air soluble, so