Type A or C Pool Filter Cartridges 2-Pack (Summer Escapes), Model: , Home & Garden Store Fits Filter Pump Models RP800, RP1000, RP2000, SFS1000, SFS2000, and ALL other models that require Measures 8 x 4.13 - Two/pack Keeps your swimming pool looking party ready, by getting rid of build-up and debris Replace your filter every 2 weeks