The Ruby is a popular sized spa with a stretched lounger, four contoured bucket seats, and walk-in steps. Turbo-charged Zone Control with Plus 31™ Air Injectors are standard features on the Ruby Plus models. A Surge-Max seat can be added to the Ruby +3. Available in all seven colors of acrylic with a redwood-stained cabinet, or if you prefer, Deluxe depth models are available with our WeatherGuard™ cabinet in Redwood or Coastal Grey.