Set of 4 !! FFB0412SHN-F00 40 x 40 x 28mm Cooling Fan, 24 CFM, 51.5 dBA, 13000 RPM, 0.60A, 3 pin Tach connector. Ship from USA !! 12V RPM : 13000 CFM : 24 dBA : 54 Bearing : Ball