Harmsco (WB-931-5) 29.25"x2.5" WaterBetter Sediment Polyester Pleated 5 Micron FilterHarmsco WaterBetter Series WB 931 5 Pleated Sediment Filter 29. 25" x 2. 5" polyester pleated cartridge engineered for high flow whole house and reverse osmosis pre filtration at 5 micron nominal Cleanable and reusable 12 sq ft media surface 140F rated 12 GPM flow rate The Harmsco WB 931 5 is a pleated polyester sediment cartridge designed for applications where surface area, flow rate, and filter longevity matter. With 12 square feet of Polyester