The part number 9846WW refers to a Balboa Water Group Cyclone Luxury series 3.5-inch Roto (adjustable swirl) spa jet internal.
This part is also widely cross-referenced as a Pentair product, as both companies are major suppliers of generic spa components.
This particular jet features a 3-1/2" textured scalloped face in a dark gray color and uses a twist-lock installation style.
Because Balboa and Pentair supply parts to a vast network of original equipment manufacturers (OEMs), many spa companies have used this specific jet internal in their hot tubs.
Manufacturers known to have used the 9846WW jet (or compatible Cyclone Luxury series jets) in at least some of their models include:
Acura Spa Systems
Aquaterra Spas
Artesian Spas
Cal Spas
Catalina Spas
Coleman Spas
Dynasty Spas
Emerald Spas (known to be a replacement for select Emerald Spa roto jets)
Four Winds Spas
Freeflow Spas
Great Lakes Spas
Hydropool
Jacuzzi (on certain models)
Life Smart Spas
Master Spas
Nordic Hot Tubs
Platinum Spas
QCA Spas
Strong Spas
Sundance Spas
Thermo Spas
Viking Spas
Vita Spas
The best way to confirm compatibility is to ensure the dimensions (3-1/2" face diameter) and the installation type (twist lock) match your existing jet internal.