Keep your Robotic Pool Cleaner working efficiently with our Ultra Fine Cartridge Filter Replacement. Improve your pool's water quality with our high-quality Filter Replacement for Robotic Pool Cleaner Parts. Don't let a faulty filter slow down your pool cleaning - 8 x 9991425-R4 pool cartridge filter replacement - Please rinse the filter every 3-5 weeks for optimal performance. Timely cleaning and correct use the fiter can last 4 years. Replace Part Number: 9991425-R4, replace 9991414-ASSY Compatible with for Dolphin Premier, DX6, Deluxe 4, Deluxe 5, DLX4, DLX5, DX5S, Triton (old), Quest, Edge, Discovery (old), Advantage Plus (old), Nautilus (old), Wave 75, Prowler 820, Prowler 830 Robotic Pool Cleaners Protect the Pool Cleaner: The cartridge filter can effectively prevent dust and other particles from entering the cylinder, reduce the wear and tear of the cylinder, ensure sufficient and clean air into the cylinder, prolong the service life of the engine and provide stronger power Color: black and white Material: ABS Filter Efficiently: This spring cartridge kit can help pool cleaner to remove debris in the pool, such as leaves, hair, dust, diatoms, and more, to help keep your pool clean Package Contents: 8 x Pool Cleaner Filter 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.