Replacement Cartridge with replaceable pleats for the Lifegard Aquatics AF-94 Double Capacity Mechanical Filter Module and the Lifegard Aquatics AF-94 Triple Capacity Mechanical Filter Module. For the Double you will need two and for the triple you will need three Cartridges. You could also just purchase the Pleats. This Cartridge DOES NOT include the Cartridge Plug and the carbon retainer inside the Cartridge. It DOES include the Pleat Retainers. 9.75" tall. 20 micron. Lifegard part# R175025X.