SINGLE FILTER FIT: Pleatco: PDO75-2000 | Unicel: C-7367 | Filbur: FC-3059 Diameter: 7 1/4" Length: 10 5/8" Top: Castle Top Bottom: Special Lock Bottom Filter Area: 75 sq ft Filter Material: REEMAY (3 oz/yard) Alternate Filter Names: 1561-00 | 17-175-1811 | Used in pools / spas made by: @Home Hot Tubs | Dimension One Spas and other manufacturers