Harpic Marine Hygienic and Fresh Sticker is a convenient self-sticking adhesive toilet block that sits discreetly inside the toilet bowl, giving lasting freshness without the need for a plastic cage. It can be applied in 3 seconds without the use of any plastic applicators and each colourful block dissolves slowly with each flush, giving up to 2 weeks of fresh fragrance. Specially designed to freshen toilets, this new and innovative sticker is supplied in a pack of 6 (4 blocks per pack).