The pool filter replacement is compatible with models PWW35L, 4CH-935, and 817-4035. Featuring a high-efficiency filtration system and excellent chlorine resistance, the high-performance trefoil fabric effectively captures dirt, hair, sediment, sand, and other debris, helping to keep your hot tub or swimming pool water clear and reducing the frequency of filter cleaning. This replacement filter includes 25% thicker filter fabric, durable end caps, and a reinforced inner core for enhanced structural stability, minimizing the risk of cracking or collapse during normal use. Designed for long-lasting performance, it helps prevent contaminants from entering clean water. Cleaning is simple—just remove and rinse with water. Material: Plastic Color: Blue Package Contents: 2 x Pool Filters Note: The package includes only the items listed above. Other products are not included. Due to light reflection and differences in display screens, the color of the item in the image may vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.