With our Maxaro Ocean Fresh toilet blocks in combination with the StarBlueDisc toilet block holder, dispensers at the flushing edge are a thing of the past. The holder is suitable for placing in the concealed cistern and specially made for toilet blocks. These blocks developed by Maxaro are 100% biodegradable and last up to 8 months. This means you need one block every 20 days on average. Moreover, there is a water-soluble foil around each block. The perforated PVA film dissolves completely and does not stick to the interior of your concealed cistern.