ReplacementBrand R50-BB Pentek Comparable 10 x 4.5 Inch 50 Micron Whole House Pleated Sediment Filter HIGH QUALITY FILTRATION: Pleated Polyester R50-BBS filter media helps capture particles 50 microns or larger REPLACEMENT FIT: Fits whole house systems that use standard 10 x 4.5 inch water filters. Replace your old Pentair R50-BB with a Tier1 R50-BB filter LONG LASTING FILTRATION: Filter life of 6 months SIMPLE AND EASY INSTALLATION: Easy installation for a frustration-free return to better water HIGH QUALITY WATER: 50 micron 10 x 4.5 water filter ensures quality water throughout your home