* Motor housing made of stainless steel (instead of aluminium).

* Double sealing design.
* Easy to disassemble and self-maintenance of bearing & sealing.
* Can be used in much polluted and salted complicated waters.
* More durable for long-term industrial and commercial use.

Pro version motors are the same power as the standard motors of
80lbs 12V, 100lbs 24V/48V, 120lbs 24V/48V, 160lbs 24V/48V, 180lbs 48V.