Duck Active Clean Pine 5 in 1 Rimblock works by helping to prevent limescale, cleaning and freshening with every flush. Combines a wonderful Pine fragrance with the cleansing action of foam. Once you place it under your toilet rim, Duck Active Clean turns each and every flush into a foamy fresh rush of bubbles, keeping your toilet clean and fragrant for up to 3 weeks. Each pack of toilet rim cleaner includes 1 Active Clean product. Toilet Duck Duck Active Clean Pine 5 in 1 Rimblock