The Arrow 1/2 in. Filter/Regulator - Lubricator Combination Unit is an effective tool for filtration. This compressed air unit is equipped with a filter that includes a 40 micron sintered bronze element. This combination unit features a 6 ounce metal bowl with a sight glass with a manual drain for convenience. The regulator included in this combination set is equipped with two full flow gauge ports, and a three position non-rising adjustment knob. This filtration set includes a gauge for clarity.