Compatible Models: for Active 10, Active 15, Advantage, Cayman, E10, Echo, Encore, Escape, Explorer E20, Nautilus CC, Proteus DX3, Prowler 910, Prowler 917, Solo, S50, S100, T15, T25, Warrior SL. Notice: This part is not compatible with the Nautilus (old), Nautilus CC Pro, Nautilus CC Supreme. Ultra-Fine Filtration Technology: The special filtration technology of the ultra-fine filter plate can filter sand, soil and other tiny particles and dust. Remove impurities to ensure clear swimming pool water quality. Improve pool cleanliness. High-Grade Material:Equipped with plastic frame and HEPA, which firmly supports the filter layer and prevents cracking during operation. Easy To Install And Clean: 9991466-R4 The Ultra-fine filter plates is straightforward to attach, load, and use. Anyone with basic hand tools can install it.Simple cleaning restores its filtration efficiency, ensuring prolonged high-performance without the hassle of complicated maintenance steps. Service life: If the ultra-fine filter basket is used properly, these ultra-fine filters can last 2-3 years. Please rinse the filter every 4-6 weeks for optimal performance. Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! color: Photo Color Material: plastic Package Contents: 4 x 9991466-R4 Ultra-Fine Filter Panels Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.