MP Industries 1973-E Tropical Floating Chemical Tablet Dispenser, 1-Inch, Blue Outdoor, Home, Garden, Supply, Maintenance This floating chemical dispenser is constructed of incredibly durable high impact polypropylene plastic It is fully adjustable and will dispense 1" Chlorine Tablets or Bromine Tablets Adjustable rate control is enhanced by the vented, full flow design EZ Refill access cap on bottom allows tablets to be re-loaded without affecting the rate setting Turn unit upside down and submerge fully to "super shock" your spa