Keep your pool clean without all the hassle with this Sta-Rite PLM150 pool filter. Made for the Sta-Rite System 2, this Sta-Rite PLM150 pool filter is a reinforced polyester cartridge that provides maximum filtration and easily traps dirt and debris. Things like mineral scale, oils and rust build up in filters, so make sure you have an extra Sta-Rite pool filter on hand, so you can spend more time enjoying your pool and less time maintaining it. Note: 125 Sq. Ft. Replacement module for PLM125 1 Buy = 4 filter replacements!