Nispira Replacement Filter Set Compatible with Puroxygen P500 / P500i and Aorda APD801 Air Purifiers, 4-Stage Filtration HEPA + Carbon, 3-Pack

["COMPATIBLE MODELS Replacement filter set compatible with Puroxygen P500 and P500i air purifiers, as well as Colzer 142C, Mooka KJ203F, UNbeaten PETS-300, Hosome KJ210F, Elechomes KJ203F-142, Simpure HP9 and other compatible units using the same filter size.","VALUE FILTER SET Package includes 3 True HEPA filter and 3 pre-filter, providing a convenient value pack to support regular air purifier maintenance and extend filter lifespan.","4-STAGE FILTER DESIGN Features a multi-layer filter structure including pre-filter, HEPA filter layer, activated carbon layer, designed to support stable airflow and overall air purifier performance.","FILTER DIMENSIONS Each replacement filter measures approximately 1.57\"D x 11.97\"W x 14.96\"H, designed to fit compatible air purifier models securely and maintain proper airflow performance.","EASY INSTALLATION Designed for a precise fit and quick replacement. Simply remove the used filter and install the new one in seconds — no tools required.","REPLACEMENT RECOMMENDATION For optimal performance, it is recommended to replace the main filter every 6–12 months and replace the pre-filter every 2–3 months, depending on usage and air conditions."]