The Royale and Regal are "sister" tubs. These have the same design except one model includes a lounge seat and the other does not. These tubs are 78' x 78". These are both available as 110 or 220 volts, and also have the options of stainless steel jets and perimeter lighting.
The Viking Series is a 72" round spa, also available as a 110 or 220 unit; with lighting and stainless steel jet option.