Dac toilet rim blocks provide excellent results. The Dac Power Active Chlorine Rim Block Kit offers four benefits in one small package. There is a 4Action formula that provides effective cleaning, effective descaling, long-lasting freshness and hygiene. This Dac toilet rim set leaves a fresh scent that lasts for a long time. This means you don't have to constantly change the rim block. Available in a 50g pack, this set of rim blocks is the only solution to keeping your toilet clean.