Pleatco: PWK65 | Unicel: C-8465 | Filbur: FC-3960 • Diameter: 8 1/2" • Length: 10 1/2" • Top: Open Hole: 3" • Bottom: Open Hole: 3" • Filter Area: 65 sq ft • Filter Material: reemay (3 oz/yard) - Close Window - Alternate Filter Names: 31114 | 71827 | APCC7215 | 16506 | Used in pools / spas made by: Hot Springs Spas | Tiger River Spas | Watkins Mfg. and other manufacturers