Deluxe Floating Chlorine Dispenser. Designed for small pools (above or inground) up to 25 cubic metres (18ft diameter pool). Lasts up to 6 weeks. Please note during extremely busy periods there may be a small additional processing time on this item. In an effort to provide the quickest possible delivery for our customers we may ship an alternative premium branded product if stocks are low. These brands will only be Blue Horizons, Deep Blue Pro, Relax or Swim Fresh, all established for a long time in the water treatment industry.