The S-Series of inline exhaust fans provide the power and flexibility needed for residential and commercial applications. The S-Series Can-Fans are available in sizes 4", 6" and 8". Durable powder coated steel Manufactured in Germany Reverse Curve Impeller 100% Speed Controllable Specs RPM: 2950 Matt Watts: 139 Amps: 1.16 @ 115 VAC 60 Hz Diameter: 15.2" Length: 9.4" Weight: 12.4 lbs Blade Design: Centrifugal Housing: Durable powder coated steel Inlet/Outlet: 8"