This fits your .

Sediment Filters Full Case of 10 Big Blue (5 Micron) Sediment Filters for a Standard Size 20" Big Blue Housing. All filters are individually wrapped for freshness and protection while in shipment. Standard Size 4.5”x 20” (5 Micron) Sediment Filter. Filters sediment particles such as silt, sand, rust, dirt, and other undissolved particles.

Professional house BLUONICS Big Blue Sediment Water Filters 10 pcs 4.5" x 20" Replacement Cartridges - 5 Micron - B07FTV1BT1