Pleatco: PSD125 | Unicel: C-8320 | Filbur: FC-2750 • Diameter: 8 1/2" • Length: 18 1/4" • Top: Reinforced Castle • Bottom: Open Hole: 2 5/8" • Filter Area: 125 sq ft • Filter Material: rEEMAY (3 oz/yard) Alternate Filter Names: 6540-482 | FC-2751 | 17-175-1732 | APCC7436 | APCC7300 | PSD 125 Used in pools / spas made by: Crystal Water Spas | Sundance Spas | Sweetwater Spas and other manufacturers