Pleatco PRB75 or Unicel C-4975
- Diameter: 5"
- Length: 20 1/8"
- Top: Open Hole: 2 1/8"
- Bottom: Open Hole: 2 1/8"
- Filter Media: Pleatco Advanced: 3 oz/yard
- Filter Area: 75 sq. feet
Most popular, standard sized filter for Hydropool Self Clean hot tubs and swim spas.