1/4" Male x 1/8" Female NPT Hex Bushing Adapter Pipe Reducer Brass Fit – compressor-source
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BBTUS Air Compressor Intake Filter Replacement Parts, 2 Pcs 16mm/20mm Thread Metal oil-less Air Cleaner, Noise Reducer Muffler Silencer - Amazon.com
1" x 3/4" Male NPTF x Female NPTF Hex Bushing Reducer Solid Brass Pipe – compressor-source
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Air Compressor Pressure Switch Control Valve And Regulator Gauges,Pressure Reducer Regulator Regulation With Manometer Air Compressor + 1 x Thread Seal Tapes(1/2-394inch) - Amazon.com
1pc 1/4" 0-12bar Air Compressor Oil Water Separator Aluminum Alloy Pressure Reducer Regulator Compressed Filters Pneumatic Parts - AliExpress