This jet internal is a common, often universal, replacement part used in spas from many different manufacturers that utilize the standard Waterway Cluster Storm jet body and diffuser (part number 218-5140).
Spa brands known to have installed systems compatible with this jet include:
Cal Spas: Often listed under their own PLU part number PLU212-1549-STS.
Dynasty Spas: Used this jet in many configurations.
Hydro Quip
QCA Spas
Vita Spa
Jacuzzi/Sundance Spas (in specific models where it is listed as a replacement for part number 9407-290)
