You are buying aSet of (10) Replacement Diffuser for a 5" Pentair Cyclone Jet made by Pentair. See the video for information on how to change the diffuser and how to determine whether you need a Waterway or Pentair Diffuser the jets look a lot alike. I also have the replacement jet in another auction if you have all of the parts from your oroginal jets. This jet fits alot of brands Cal Spa, Viking, Master Spa, Hawkeye, Infinity, Four Winds, Catalina, Dynasty, Artesian, Hydrospa,La Spa, Spa Crest, Destiny River but also not that these same brands use Waterway Jets too which are completely different..
We also offer this diffuser in a single, set of 5 and 10..