. BENEFITS: 1) Domex Rim Block leaves behind a fresh burst of refreshing Lemon fragrance every time you flush!2)Ensures hygienic cleaning with every flush.3)Delivers limescale prevention with every flush.4)Foam cleansing that provides sufficient time for the product to deliver its cleaning action.HOW TO USEStep 1:Remove cage from the pack. Do not remove the protective film, this will dissolve in water.Step2:Secure the cage over the rim of the toilet bowl, adjusting the position and height, ensuring the block is in the water flow.Step 3:To replace, throw away any remaining undissolved material into a bin and replace with a new Domex Germ Blaster Rim Block. Available in lemon and ocean variants.