Two 20″ x 4.5″ Jumbo PP Sediment Filter (1 micron)for Big Blue Whole House Water Filter System Specifications:Individually wrapped in films for freshness. Fits all Big Blue 20″ x 4.5″ Water Filter Housings. PP Sediment filter removes sand, dirt, and rust particles.Flow rate: 6~8 GPM;Filter life: 20,000 gallons or every 8-12 month;Dimensions: Length = 20″, O.D. = 4.5″, I.D. = 1 1/8″ The package includes: 2 pieces of 1 Micron 20″ x 4.5″ PP Sediment Filter On Nov-10-12 at 21:00:50 PST, seller added the following information: Add a map to your own listings. FREE Trial !