Choosing a bathtub or SPA is like buying a car. Each model presents serial ítems and optionals that can be added by client. On this matter, is possible to choose from shape until amount of whirlpool jets, and ítems like chromoterapy, air blower, multimidia, among others. On gel coat verison is possible to choose color of the product. Astra is market leader on this sector with many models available.