Pentair 98212200 Union Nut Replacement Pool and Spa Filter Union nut replacement Fits Pentair Clean & Clear aboveground, Clean & Clear/Predator pool and spa cartridge filters Also fits Pentair Warrior, EasyClean aboveground pool and spa D.E. filters Compatible with Pentair EasyClean, Warrior pool and spa D.E. filters Measures 3-1/2-inch length by 1-1/4-inch height by 3-1/2-inch width