The Pentair 360363 Cartridge Filter Kit is designed to provide maximum filtration efficiency and durability. It features a large, pleated filter media that has been designed to capture the smallest particles of dirt, debris, and algae from your pool water. The filter housing is made with high-impact plastic. The clear lid allows you to quickly check on the condition of the filter without having to take it out of the housing. - The Pentair 360363 Cartridge Filter Kit is easy to install and maintain. It is designed for use with Pentair Kreepy Krauly Prowler and other robotic pool cleaners. To install the kit, simply remove the old cartridge filter and gasket from the filter housing. Insert the new cartridge filter and gasket into the filter housing. Replace the lid on the filter housing. - Easy to install and maintain - Provides maximum filtration efficiency Made with a high-quality, durable material Helps trap dirt, debris, and algae from the pool water - Fitment guidelines:Compatible with Pentair Prowler 930W, Pentair Prowler 920, Pentair Prowler 930, Pentair Prowler 930 w/Swivel, Pentair Warrior SE (2019, Pentair Warrior SI (2019), Dolphin Active 20, Dolphin Active 20 W/Swivel, Dolphin Active 30 US (2019), Dolphin Active 30 w/Swivel, Dolphin Active 30i, Dolphin Active 30i US (2019), Dolphin Active 30i w/Swivel, Dolphin Active 40, Dolphin Active 60, Dolphin Advantage Ultra, Dolphin Discovery M2BIG, Dolphin Discovery w/Swivel, Dolphin Explorer E30, Dolphin M600 US (2019), Dolphin Mercury, Dolphin Mercury (2019), Dolphin Premium (2020), Dolphin Premium Energy M2CIG, Dolphin Premium w/Swivel, Dolphin Proteus DX4, Dolphin Proteus DX5i, Dolphin Proteus DX5i (2021), Dolphin Proteus DX5i (WIFI) (2020), Dolphin Quantum, Dolphin Quantum w/swivel, Dolphin S200, Dolphin S200 w/Swivel, Dolphin S300 US (2019), Dolphin S300 w/Swivel, Dolphin S300i, Dolphin S300i US (2019), Dolphin S300i w/Swivel, Dolphin S400, Dolphin Scoop Comfort, Dolphin Scoop, Deluxe, Dolphin T35, Dolphin T45, Dolphin T45 US (2019), Dolphin T55i, Dolphin T55i Demo (2019), Dolphin Triton PS, Dolphin Triton PS Plus, Dolphin Triton PS Plus (2019), Dolphin Triton PS Plus w/Swivel, and Dolphin Triton PS w/Swivel. Might be compatible with older models as long as the part number is listed in the product manual. - Additional Information: Alternate part numbers - PEN360363 and KPY-201-0231