Product Details SKU 100/050 Shipping Weight 40.00 lbs Product Description CTA Pumps come complete with Silencer, Oiler, Pulley and zinc terminal valve. Pump performance, or CFM, varies according to ambient temperature, humidity, air pressure, elevation and many other factors. At sea level at a temperature of 68F, with a 2HP motor, the RPM of this model is 1250 and the CFM is 17. There is about 4 CFM needed per cow. Weighs 78 Lbs.