Maytronics 9985006-R2 Tracks For Dolphin Prowler 820/830, Wave 50, 75, 90, Wave 2X2 GYRO, Quest, Premier, Apollo Plus , Discovery, Nautilus, Advantage Plus RC, Advantage Plus Pro RC, DX6, M400, M500, Edge Triton Robotic Pool Cleaners, Grey, 2/Pack
I bought these for a maintenance rebuild of my Maytronics Dolphin Premier, along with foam rings and a brush. Roboto had stopped climbing the walls like it used to.
These tracks fit just right as they supposed to with the application of a little Body English as they have to fit tight - you need to be moderately handy to do this whole rebuild and find good videos on YouTube, as a couple of the steps are not entirely intuitive. But the construction of the robot is not the responsibility of the E-Z.
E-Z has the correct parts and prompt shipping.
Highly recommended.