Safety First offers air safety trailers that will supply your employees with a clean Grade ‘D’ breathing air source while working in a possible toxic environment. Our air safety trailers are equipped with either 6 or 8 4500psi breathing air cylinders as well as 700’ of breathing air hose, and a manifold allowing multiple employees to be protected from a single trailer. All breathing air is checked by an outside lab on a quarterly basis to ensure the quality of the air we are providing.