Big D 691 Extra Duty Urinal Screen with Non-Para Block, Clean Breeze Fragrance, 2000 Flushes (Pack of 12) - Ideal for restrooms in offices, schools, restaurants, hotels, stores Contains no paradichlorobenzene Lasts up to 2000 flushes Blocks are water-soluble and 100% biodegradable Acid-free Clean Breeze Fragrance