Bloo Power Active Toilet Rim Block was the first of its kind - an innovative rim block which combines design and function in one Every ball is loaded with a perfumed core that has 40% more fragrance freshness vs the outer shell, giving a boost of fresh lemon fragrance from the first to the last flush. A hygienically clean and fresh toilet with every flush! This pack contains 3 x rimblocks, each toilet block lasts up to 240 flushes