Guardian Filtration Products 719-111 New in factory packaging Replaces: Pleatco PA50, Unicel C-7656, Filbur FC-1240 Measurements: Diameter: 7", Length: 19-3/4", Top: 3" open hole, Bottom: 3" open hole Filter Area: 50 sq. ft. Filter Material: Reemay 4oz (4 oz. media has a longer filtration life than the standard 3 oz. material) Compatible with: American Products | Cal Spas | DM Industries | Hayward | Hercules Spas | Hollibaugh Spas | Maax Spas of AZ | Pdc Spas | Pentair Pool Products | Premier | Purex | Springwater | Vita Spas and other manufacturers Also replaces: CX500-RE | C-500RE | SD-00056 | R173409 | 27-079 | C-7651 | FC-2140 | SD-00173 | 07-0654 | C-7450 | FC-0625 | SD-00830 | R173203 | 57005800 | SD-00835 | CF-50 | CX-500 | C-500 | Hayward Star-Clear C500 | Pentair Purex CF-50 | FC-0620 | 17-175-1045 | 17-175-1315 | APCC7152 | 15004 | 090164001500 | C-7650 | PA 50 | PCM50 | PCM 50 | PCM50-HD | PPF50 | PPF 50 | PCM50-4 | PPF50-4