Package include: 1 Piece fan include mounting screws & nuts. Dimensions: 40mm (L) x 40mm (W) x 20mm (H) / 1.57'' (L) x 1.57'' (W) x 0.79'' (H) Rated Voltage: DC 24V; Rated Current: 0.06Amp; Rated Speed:6000RPM; Air flow: 7.85CFM; Noise: 21.35dBA Bearing Type: Hydraulic Bearing ; Life: working up to 40000h at 25 degrees. Connector: XH2.54-2Pin; Lead wire: UL Type (+): Red wire ; (-): Black wire. This is a two wire cooling fan.