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.) High Speed: This model is designed to maximize airflow and can be too loud for some applications. Speed: 4500RPM ; Air flow: 179.2CFM ; Noise: 54.2dBA; Bearing type: Dual Ball Bearing Please Comfirm the Fan Size, Voltage, Connector and other parameters before purchase.