Keystone's 5 Micron Giant Pleated Fine Sediment Filter Cartridges feature:

• Unique blend of cellulose and polyester media.
• High dirt holding capacity -- 2 to 3 times the capacity of similarly sized depth cartridges.
• Fits Giant Keystone and most competitive large diameter (4 1/2") housings.
• Replaces any large diameter 20" filter cartridge