F-Matic OmniGuard urinal deodorizer, descaler, and cleaner is the solution for complete urinal care. Powerful cleaner and descaler removes years of calculus build-up in pipes and prevents new build-up from forming. Helps prevent costly plumbing bills due to build-up in pipes. Eliminates a major source of urinal odors deep in the pipes and emits a light, fresh scent. No tools, tapes, or screws required for a simple, seconds-only installation; easy refill cartridge for fast servicing. No metal parts to create rust or scratch on porcelain. In-urinal placement discourages vandalism. Contains no paradichlorobenzene, a possible carcinogen. Gentle on pipes - no harsh cleaners. Semi-permanent bracket reduces waste from each use. Refill cartridge made with #5 recyclable plastic. OmniGuard, with its flexible design, fits most urinals, providing unlimited men's restroom placement opportunities.