Aquabot Aquatron Aqua Products Impeller Propeller Fan Pool Robot (One)
There is a screw in the middle on this impeller. There is no difference between the two.
Dolphin Robotic Pool Cleaner Motor Unit: Part Number 9995365RD-EX Diagnostic 4HR
9995365RD-EX, designed to provide optimal performance for your Dolphin Robotic Pool Cleaners.