This is a filter. I don't know what to tell you. Seems to work but I have no idea. After I bought them I found I had an extra one from a better set and these are the ones sold down the street at Tractor Supply for a lower price.
Filter under the sink Aquaphor Favorit ECO silver
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NANPU 1 FRL Air Filter Regulator Lubricator Combo With 0-150 Psi Gauge, 5 Micron Brass Element, Poly Bowl & Semi-Auto Drain - Metal Bracket Included
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π§ NANPU 1/2" NPT Compressed Air Filter Regulator Combo Piggyback with Auto Drain, 5 Micron Brass Element, Poly Bowl, Metal Bracket, and 0-150 psi Gauge
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NANPU Air Drying System With Double Filters And Pressure Regulator Combo For Clean And Controlled Air Supply
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