Brand new OEM replacement discharge line for Rolair air compressors, part number: FDT9. This is a braided steel line that goes from the pump to the tank of your compressor. This is a Rolair OEM replacement part and features a 7/8" Female Tapered Flare fitting as well as a 1/2" Male NPT fitting. You can use this line on many different models, including: 4090HK17, 6090HK18, 1040 Series, 2040 Series compressors, and more. This is a 1/2" diameter braided steel line that measures 8-1/2" long with solid brass fittings on each end.