181PSI 5.5HP 21CFM V Type. Twin Cylinder Air Compressor Pump Head Double Stage. 1181PSI 5.5HP 21CFM V Type Twin Cylinder Air Compressor Pump Head Double Stage. The item “V Type Duplex Air Pump Air compressor Accessory 181PSI 5.5HP 21CFM” is in sale since Wednesday, September 25, 2019. This item is in the category “Home & Garden\Tools & Workshop Equipment\Air Tools & Air Compressors\Air Compressors”. The seller is “artdidinc” and is located in Tampa, Florida. This item can be shipped to United States.