Impeller : Polycarbonate (glass fiber-containing), 5-bladenBearing: Ball bearingnMotor: 115 VAC, 50/60 Hz, 15/13W, impedance protectednCasing: Aluminumn95 CFM air flow, 2750 RPM, 39 dBA noise ratingnFAN Fan Size: 4.5" Features: -Hardware and cord included with each unit. -4.5'' model: 105 CFM. -6'' model: 220 CFM. -10'' model: 550 CFM. Product Type: -Fans. Dimensions: Overall Depth - Front to Back: -1.5 Inches.