Rotary Roots Lobe Blower. Includes: Inlet Filter Assembly with Filter element, a Drive belt, pulley installed on blower shaft and an additional pulley which may be used for attaching to your electric or gas drive motor. Rated for electric drive motors: 3/4 hp to 1.5 hp OR 3hp to 5hp combustion (gasoline or diesel) motor. 4 Bolt mounting plate on bottom measures: 4.75 inch x 3.25 inch Rectangle Plate with a: 2 3/8″ x 3 15/16″ center to center bolt pattern. Specs: Output Port: 1 inch USA female pipe thread (FPT) Output Pressure. 49kpa / 7.1psi / 16.5 ft H2O Output Flow. Drive Speed: 1700 – 2000 RPM for peak efficiency. (1100rpm min / 2200rpm max). The item “Roots type Rotary Lobe Air Blower, Compressor / Vacuum Pump 17CFM HDL-6.9/86″ is in sale since Tuesday, June 9, 2015. This item is in the category “Business & Industrial\HVAC & Refrigeration\HVAC & Refrigeration Components\Air Handlers”. The seller is “winnnky” and is located in Wisconsin Dells, Wisconsin. This item can be shipped worldwide.