Pool replacement filter panels, set of 4, designed for use with compatible robotic pool cleaners including Dolphin models Active 20, Active 30, and M600. Key benefits Captures fine dirt, sand, gravel, and leaves to improve cleaning performance and reduce time spent on manual maintenance. Washable and reusable pleated panels extend service life and keep your pool cleaner operating efficiently over repeated use. Numbered panels simplify installation so even first time users can filters without confusion. Quick to clean with a garden hose sprayer for fast turnaround between uses. Product features Compatibility: Direct replacement panels for compatible robotic pool cleaner models such as Active 20, Active 30, and M600. Performance: Ultrafine pleated design traps smaller particles that standard filters may miss, helping maintain clearer water and reducing strain on the cleaner. Maintenance: Panels remove easily from the basket and rinse clean; no special tools required. Durability: Built to withstand regular use and repeated washing for reliable seasonal performance. Package content: 4 filter cartridges. Color as shown. Material and size not specified in the product listing. Simple installation and care Remove the old panel from the cleaner basket. Match the numbered replacement panel and insert into the same position. Rinse with a garden hose until debris is removed, then allow to dry before reinstallation. Use scenarios Routine weekly cleaning to maintain clear water and reduce scum build up. Poststorm cleanup when sand and leaves are introduced into the pool. Pre and post use periods such as pool parties to minimize manual skimming and extend intervals between deep cleaning. This set of replacement filter panels offers a straightforward way to restore or upgrade your robotic pool cleaner filter performance while keeping maintenance fast and simple.