Martech 75450 The Painters Choice - One Person UnitThis complete kit includes a breathing air filter unit, a carbon monoxide monitor, sample air attachment kit, and a 35' single line hose assembley. By using your existing pre filtered spray air, you can install the breathing air filter unit inside the spray booth. Then simply attach the monitor by using the air sampling kit to bring the sample to the monitor mounted on the outside of the booth. Then attached the 35' single line hose to the filter