
The X310205 has been discontinued. The Master Spas's recommended replacement is the X310310 (On some tubs, this will require slight shell modification to make the hole slightly larger).
Recommended Replacement:
Master Spas - Topside Panel, Rectangle ST2C Swim - X310310
Balboa Part Number: 50386
| Spa Model | Year | Specific Model |
| Michael Phelps Swim Spas | 2014 | Momentum 80, Momentum 80 Deep, Signature, Signature S, Force, Impact |
| Michael Phelps Swim Spas | 2015 | Momentum 80, Momentum 80 Deep, Signature, Signature S, Force, Force Deep, Impact |
| Michael Phelps Swim Spas | 2016-2017 | Momentum 80, Momentum 80 Deep, Signature, Force, Force Deep |