To perserve pneumatic tools, create professional finishes and cut maintenance costs, a quality filtering and regulator system is critical. Prevost's ALTO units remove dust, oil and liquid water to prolong the life of the enter system and its components. ALTO treatment units are available as individual units (filter, regulator, lubricator, filter-regulator) or fully assembled kits that include a pressure gauge and mounting brackets. They cover a range of sizes from 1/8" G to 2 1/2"G threads.