[Microfiltration] Filter cartridges are designed to trap only large debris and allow finer debris to pass through. This prevents the cartridges from clogging quickly when the pool is particularly dirty. [Compatible Use with Multiple Versions] Perfect filter for Dolphin pool robot: S50 Active 10, Item Number: 9991460-R1. [] More robust and . plastic frame. It firmly supports the filter layer and prevents it from breaking during operation. Same as model number 9991460-R1. [REDMIND INSTALLATION] When used properly, ultra-fine filters can last 2-3 years. For optimal performance, please rinse the filter every 4-6 weeks. Note: Color differences or deviations do not affect use, please don't worry! Material: Plastic Color: As shown Package includes: 1 x Ultra-fine filter basket Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item to be slightly different from the original. The allowable measurement error