Over 12 years old Working hydro low rpms permanent magnet generator. 21″ dia. 12 volts at 98 rpms. Check out my other video on a new one being tested by hand.
https://www.youtube.com/watch?v=lbpRdme4Tpg
website:https://www.jhmindustry.com/
Shanghai Jian & Mei Industry and Trade Co., Ltd. is the company which manufacture and export fasteners and metal hardware, founded in 2006, with import-export authority. Now, 80% products export to all over the world and 20% sell in domestic market.