Pentair 25022-0201S Large Outer Cartridge Replacement Sta-Rite System 3 SM-Series S7M120 Pool and Spa Cartridge Filter
This large outer cartridge is designed to use with Pentair Sta-Rite System 3 SM-Series 21-inch pool and spa cartridge filter model S7M120. 200-square feet filtration area. Measures 19-inch length by 23-inch height by 19-inch width.