Spring-loaded filter cartridges compatible with Dolphin M500, M200, M400, Wave 90, VE 65, Oasis Z5, Sigma, C3, C4 and Nautilus CC Plus models. Part number: 9991433-R4 (pack of 4).

[Microfiltration Technology] The spring-loaded filter cartridges are designed to retain only large debris and allow fine debris to pass through, thus preventing the cartridges from clogging too quickly when the pool is particularly dirty. [Multi-version Compatibility] The Fiitzn water filter is fully compatible with the following Dolphin robotic pool cleaners: Nautilus CC Plus, Oasis Z5i, Aquarius XL, Odyssey, C3, C4, Sigma, M200, M400, M500, M4, M5, Bio, Triton Plus (older model), Liberty, Wave 65, and Wave 90.Reference: 9991433-R4. [Durable] ABS plastic frame, more robust and durable. It firmly supports the filter layer and prevents it from breaking during operation. [Dimensions] 26.5 cm x 16.0 cm each, set of 4, identical to original model number 9991433-R4. [REDMIND INSTALLATION] - When used correctly, these ultra-fine filters can last 2 to 3 years.For optimal performance, please rinse the filter every 4 to 6 weeks.