[Multi-version Compatible Use]water filter Perfect Compatible with the for Dolphin Robotic Pool Cleaners:Active 20, Active 30, Active 30i, Active 40, Active 60, Advantage Ultra, Discovery (new), Explorer E30, Explorer E50, Explorer E70, M600, for Mercury, Premium, Proteus DX4, Proteus DX5i, Prowler 920, Prowler 930, Prowler 930W, Quantum, S200, S300, S300i, S400, T35, T45, T55i, Triton PS, Triton PS Plus, Warrior SE, Warrior SI . Part number: 9991467-R4. [Installation without Any Difficulty]Replacing the filters with these pleated filters is both simple and straightforward. Each panel is numbered to correspond to the position it needs to be installed in the hanging basket. It is impossible to place the filter in the wrong slot. It is recommended to remove the filters in the order of filter numbers 1-4. When replacing them in descending order starting from 4-1, it is easiest to replace the filters [Solid Structure and Long Lifespan] plastic frame is more sturdy and durable. It firmly supports the filter layer, preventing it from breaking during operation. The ultrafiltration has three layers, and the thick pleated style similar to HVAC filters provides a larger filtration area, with a surface resembling a waffle cake and finer mesh. All of these greatly enhance the robot's ability to pick up debris from the pool [ Packaging Quantity ] Provide two complete sets of filters (8pack) compatible with for Dolphin 9991467-R4 Please note: the physical slightly color difference or difference, does not affect the use, please do not mind, thank you! Colour:Photo Color Material:plastic Package Contents: 2 x 9991467-R4 Ultra Fine Filter set 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.