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 “TECHTONGDA V Type Twin Cylinder Air Compressor Accessory-Pump 5.5HP 21CFM 181PSI” is in sale since Thursday, January 9, 2020. This item is in the category “Home & Garden\Tools & Workshop Equipment\Air Tools & Air Compressors\Air Compressors”. The seller is “yazion30″ and is located in Rancho Cucamonga, California. This item can be shipped to United States.