HOW TO USE FILTERS: To your left are filters you may choose to narrow down options for this particular bathtub. Please note you only see the options for the particular model you have chosen. While most categories are self-explanatory, the massage series indicates what type jets and how many. For freestanding baths, the first letter indicates the type of jet (Air, Hydro (water), Combination air/hydro, Soothing Soak, or Heated Oxygen Soak) followed by the number of jets. For alcove, corner, and drop-in baths, the first letter indicates the type of jet (same as freestanding) and the second letter indicates the package (Silver, Gold, or Platinum). “TO” always indicates “tub only” with no jets.