The Pentair 27002-0300S is a replacement filter cartridge designed specifically for use with the Sta-Rite System 2 modular media pool and spa cartridge filter model PLM300. This filter module offers a 300-square-foot filtration area and is constructed with advanced media technology to provide efficient and effective water cleaning capabilities for in-ground pools and spas. It features a durable design with shallower pleats and balanced flow to enhance dirt-loading capacity and reduce maintenance frequency.