1/4" Male NPT Connection Thread.
178D15-KIT Air Compressor Unloader Tube Kit Fit for Rolair Air Compressor
(GB) New 178D15-KIT Rolair Air Compressor Unloader Tube Kit + full model list
25Pcs 60Inch Air Compressor Unloader Tube Kit, 3/8 Inch 60" Tube 25PCS
New 178D15-KIT Rolair Air Compressor Unloader Tube Kit + full model list in
Air Compressor Unloader Tower Diaphragms Compatible with Quincy 1855 Fits