Dolphn Triton PLUS and Nautilus PLUS use these (9991432-R4) filter cartridges! NOT for regular Dolphin Triton or Nautilus (see 9991425-R4) Maytronics Ultra Fine Filter Cartridge, For Use With: Triton Plus, Nautilus Plus, Dolphin Supreme M4, Supreme M5, Supreme M200, Supreme M400, Supreme M500, Liberty, Wave 65, Wave 90, C3, C4, Oasis Z5, Robotic Pool Cleaners,

Product Features

• Perfect for daily cleaning to keep your pool crystal clear
• Highly-efficient, clog-free ultra-fine filtration for small debris
• Easy rinse and reload
• Fits models: M200, M400, M500, Nautilus CC Plus, Oasis Z5i, Sigma, Odyssey, C3, C4