[COMAPATIBLE] Replacement for dolphin ultrafine filter 9991467-R4, compatible with Dolphin robotic pool cleaners models below: Explorer E30, Explorer E50, ExplorerE70, M600, Proteus DX4, Discovery (new), Premium, Proteus DX5i, Mercury, Ouantum, S200, S300, S300i, S400, T35, T45, T55i, Active 20, Active 30, Active 30i, Active 40, Active 60, Advantage Ultra, Prowler 920, Prowler 930, Prowler 930W, Warrior SE, Warrior SI, Triton PS, Triton PS Plus. [PREMIUM FILTRATION] 9991467-R4 ultra-fine filter panels trap even the smallest debris like pollen sand and hair to keep pool water crystal clear.Provides you with crystal clear, debris-free pool water. [INSTALLATION and MAINTENANCE] Each ultra-fine cartridge filter panel for Dolphin is numbered to correspond to the position in the basket where it is to be installed.It is recommended that the Dolphin ultra-fine filter panels are removed in order of numbering from 1-4 and then replaced in descending order from 4-1.Not only are our ultra-fine filter panels easy to replace, cleaning them is also very simple, the 9991467-r4 ultra-fine filter can be easily popped out. [MAXIMUM POOL PERFORMANCE] Our 9991467-R4 ultra-fine filter panels feature an ABS plastic frame and pleated ultra-fine Pet filter paper for a stronger overall structure. With optimized filtration, the robotic cleaner can operate at peak efficiency to clean your entire pool surfaces thoroughly. Colour:Black+White Material: Plastic Package Contents: 4x Swimming Pool 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.