A complete urinal maintenance screen and block in one product. De-scales, de-limes, cleans, deodorizes and disinfects. With each flush, the block deposits a protective film that prevents waste build-up in the trap and helps keep the drain open. Non-para, no orthodichlorobenzine. Contains odor conditioning agent. Easily removed and replaced. Averages 30 days. Pleasant spice scent. USDA approved. Size is 7 inches. Packed 12 per case.