Big Blue Pleated Sediment Water Filters 20 Washable 4.5 x 10 Cardridges 5 Micron Full Case of 20 Big Blue Pleated (5 Micron) Sediment Filters for a Standard Size 10" Big Blue Housing FREE SHIPPING Standard Size 4.5" x 10" Pleated filters have a larger filter surface area, longer cartridge life, higher flow rate, greater dirt holding capacity, lower pressure drop, and more efficient when compared to other sediment filters. They are individually wrapped for freshness and protectoin while in shipment.