There are 4 models:
– Intex 28429E PureSpa Plus — the best bubble jets
– Intex 28427E 85in PureSpa Inflatable Spa — the most durable model
– Intex 77in PureSpa Portable Bubble Massage Spa — the best at retaining temperature
– Intex 28439E Greywood Deluxe 4 Person Inflatable Spa — the most advanced accessories
You can read how these models differ in our article.