Lay-Z-spa 2nd Generation 2021 – 2026 Square Airjet – light grey with flip up display & Cup holders – 3 pipes SIDE THERMAL RESET BUTTON, Lay-Z-spa 2nd Generation Square Hydrojet pre 2026 – LIGHT GREY WITH FLIP UP DISPLAY AND CUP HOLDERS – SIDE THERMAL RESET BUTTON. 4 connection pipes, Lay-Z-spa Ist Generation Old Style Hydrojet Pre 2021 – LARGE BLUE CASE WITH LIGHT CREAM BASE – NO CUP HOLDERS. 2 OR 3 PIPE CONNECTIONS, Lay-Z-spa Ist Generation old shape egg – any colour – 3 PIPE CONNECTIONS, Lay-Z-spa new 2026 Hydrojet – NO SIDE RESET BUTTON, Lay- Z-spa New Air jet 2026 – NO SIDE RESET BUTTON ON THE CASE