Mil surplus 3" dia. 115 VAC 400 Hz.equipment cooling fan. Made by IMC
Magnetics Corp. model IMCool 300. Speed is 13,000 rpm, 0.23 A current.
More available, all tested. See link below.
http://us.ebid.net/perl/auction.cgi?...333&mo=auction
( no listing fees on
www.ebid.net )