Guardian pool/spa filter fits:Pleatco: PBW4PAIR, Unicel: C-4313, Filbur: FC-3753 intex pools, simple set walmart krystal clear spas
2 pack filters made in the usa new in factory packaging replaces: Pleatco: PBW4PAIR | Unicel: C-4313 | Filbur: FC-3753 • Diameter: 4 1/4" • Length: 3 3/4" • Top: Open Hole: 2 1/16" • Bottom: Open Hole: 2 1/16" • Filter Area: 6 sq ft • Filter Material: reemay (4 oz/yard) Note: 4 oz filtration material is 33% thicker than the standard 3 oz. As a result it will last longer and filter more thoroughly. Alternate Filter Names: Size 1 | Simple Set Type 1 | Type D | WM-3779 | 090-050140 | 11692 | Used in pools / spas made by: Aqua Leisure | Best Way Accessories | Bestway | Intex Pools | Krystal Clear | Simple Set | Walmart and other manufacturers