This Maytronics Dolphin 99952142-ASSY Nautilus Plus Outer Casing Assembly is a reliable replacement part, designed to seamlessly intergrate with the original pool cleaning system. The casing assembly protects and ensures continued operation of the pool cleaner. Maytronics pool cleaners help keep your pool healthy and clean, which is of the utmost importance. Ensure that your pool cleaner is running as cleanly as possible with this certified genuine part.