Duck Fresh Discs Citrus Twin Refills with fabulous fragrance, clears odours to last up to 6 weeks, helping keep your toilet cleaner for longer.Did you know that traditional toilet cleaner cages can harbour germs? Duck® Fresh Discs have a gel-based formula that self-sticks to the toilet bowl so germy cages aren't something to fret about. Fresh Discs prevent the build up of limescale and stains that harbour germs. Just stick it to the inside rim of the toilet bowl to keep things clean. Pretty easy, huh?12-count refills compatible with Duck Fresh Discs Citrus Starter kit - also available in Marine, and Lavender.Refill Pack (dispenser not included)Contains 2x Gel holder refills (12 Gel Discs)4in1 - Fights stains that harbour germs, continuously cleans, fragrances with every flush, lasts up to 6 weeks1 gel refill tube lasts up to 6 weeks.