Pentek Pentair 155405-43 S1-BB Pleated Cellulose Sediment Water Filter Cartridge 20 Micron 9-3/4"x4-1/2", Pack of 8 City water only Contaminant Reduction Sediment (sand, dirt, silt, rust, and scale particles) Dimensions: 20" L x 4-1/2" D Rating: 20 micron Flow Rate: 1.2 psi at 10 gpm