Dimensions : 80 × 80 × 38mmFan speed : 15000 ± 10% RPMBearing Type : dual ballLife: 40,000 hours (25 °, 45 to 85 % relative humidity )Fan Noise : 60DBFan air flow : 45.70CFMRated voltage : 12V 1.8AInterface Type: Four-wireSpeed Monitoring : SupportFans line length : 15MMain purpose: . . . The server chassis cooling temperature equipment computer .CPU electrical and electronic equipment cooling welding platm cooling ventilation equipment .. .. hair equipment ....