Dimension of outer the frame is 50mm(L) x 50mm(W) x 15mm(H) / The size of fan in inch is 2in(L) x 2in(W) x 0.6in(H); The center to center distance beween the mountiong holes is 40mm/1.57in.
Operating Voltage Range:5.5V to 13.8V. (overtake to 13.8V, it can also work. but not safe, and seriously affects lifespan of fan.)
Rated Voltage: DC 12V; Rated Current: 0.1Amp; Rated Speed: 5000 RPM; Air flow: 12.5CFM; Noise: 32dBA; Power: 0.8Watt.
Connector: XH2.54-2Pin; Lead wire: UL Type (+): Red wire ; (-): Black wire. This is a two wire cooling fan; Bearing Type: Sleeve Bearing ; Life: working up to 35000h at 25 degrees.
Package include: 2 x 50mm cooling fans; 8*M3X18mm screws & nuts( The fan is mounted by screws.)