DAC Rim blocks is an innovative toilet block which combines style & function in one. It contains cleaning agents that work against lime scale and dirt, maintaining a long lasting cleanliness of your toilet It contains air-fresh agents that provide a pleasant scent, keeping your toilet fresh flush after flush 1) Cleaning foam (cleans the toilet with every flush) 2) Anti-lime scale 3) Dirt Protection (prevents new dirt sticking) 4) Extra Freshness.