NOS Curtis-Toledo Challenge Air Compressor Pump Vertical ES-05. New old stock air compressor pump in factory box. Box will show shelf wear. LOC: AR-TOTE-LARGE-TOTE-8 & 9. The item “NOS Curtis-Toledo Challenge Air Compressor Pump Vertical ES-05″ is in sale since Tuesday, October 23, 2018. This item is in the category “Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Air Compressors & Blowers\Other Air Compressors”. The seller is “serendipitysurplus” and is located in Berthoud, Colorado. This item can be shipped to United States.