Big Blue Sediment Replacement Water Filters 4.5" x 10" (5 Micron) 20 Cartridges Full Case of 20 Big Blue (5 Micron) Sediment Filters for a Standard Size Big Blue Housings. All our filters are individually wrapped for freshness and protection while in shipment. Food and beverage Reverse Osmosis Pre filtration Water Filters and Aquariums Fine Chemicals Oil and gas Fine Chemicals Metal Finishing Pulp and Paper