This complete Filter Housing System Rainbow Dually Space Saver II is found in Conway or Emerald Brand Hot Tubs and comes as a complete unit.. Note: The Cartridges are not included..
Here is a link to the two cartridges for this housing:
Filter Cartridge, 9sqft, 2-1/8"ot, 2-1/8"ob, 2-7/8", 17-1/16", Emerald Spa
Filter, Cartridge, 15sqft, 1-1/16"ot, 1-1/16"ob, 2-7/8",17-1/16", Emerald Spa