This Maytronics Dolphin™ 9991706 Triton Plus Cartridge Door Kit is a reliable replacement part, designed to seamlessly intergrate with the original pool cleaning system. The cartridge door kit protects the cartridge, while allowing for easy access. 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.