LINCOLN INDUSTRIAL LNI-939 6' Air Operated Sprayer Metallic The LINCOLN INDUSTRIAL LNI-939 is an air-operated sprayer designed for various applications in automotive, agricultural, marine, truck, construction equipment, and machine manufacturing industries. This sprayer features adjustable suction control to vary fluid volume as needed and a strainer assembly in the suction hose to keep out contaminants. The LINCOLN INDUSTRIAL LNI-939 is ideal for cleaning parts, engines, machines, and equipment.