Dimension of outer the frame is 120mm(L) x 120mm(W) x 38mm(H) / The size of fan in inch is 4.72in(L) x 4.72in(W) x 1.5in(H); The center to center distance beween the mountiong holes is 105±0.3mm/4.13in. Operating Voltage Range5.5V 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: 0.5 Amp; Rated Speed:3000RPM; Air flow: 104CFM; Noise: 43 dBA Connector:XH2.54-2Pin; Lead wire:UL Type (+): Red ; (-): Black. This is a two wire cooling fan. Please Comfirm the Fan Size, Voltage, Connector and other parameters before purchase.