FlexiBlok Series Air Line Filter, 1/4 Inch Ports, 5 micron Element, 32 SCFM Flow Rating, 1.5 oz Bowl Capacity, Metal Manual Drain

It's designed for direct connection to 1/4 inch NPT ports, so you shouldn't need any adapters if your lines are also 1/4 inch NPT.

With 1/4 inch NPT ports, it’s set up to thread right into a 1/4 NPT compressed air line. It can be mounted as a standalone filter, or tied into other FlexiBlok FRL pieces as a modular stack using the included screws and O-rings.