Clean Air Set: DAR02B Digital Air Regulator and AI303 Inline Water Filter

Set the exact pressure and keep water and oil out of the line. The LE LEMATEC DAR02B digital regulator paired with the AI303 inline filter. Bought separately, these parts cost $45.98.What is in the set DAR02B Digital Air Regulator: 0 to 160 PSI, LCD reads PSI, BAR and KPA, 16 CFM, CR2032 battery, 1/4" NPT ($28.99 on its own) AI303 Inline Air Filter: 2 to 150 PSI, 1 micron filter, 1/4" NPT, aluminum body with brass fittings, push-button drain ($16.99 on its own) Shipping: Free shipping on every US order. Ships from Amazon fulfilment, so parts may arrive in separate boxes.QuestionsWhich goes first in the line? Install the filter first, then the regulator, so the regulator only sees clean, dry air.Who is this set for? Anyone spray painting or airbrushing, where steady pressure and dry air decide the finish.