The Quality Air Breathing System Model 50 SL ensures compliance with the OSHA requirement for Grade “D” Breathable Air. When used properly, it will work with the existing compressed air supply. It provides breathable air for a NIOSH-approved respirator, and with the provided 54" tool air hose, it will supply air for a spray gun, all via the included single-line hose assembly. Call (800) 831-1525 or visit www.breathingsystems.com.