5 Gallon 4 Port HiVis Manifold. Eliminate clutter by running just one air hose to your worksite and connect up to eight pneumatic tools at once. Equipped with a gauge to monitor working pressure and a 200 psi pressure relief valve to prevent excess pressure build-up. Top and bottom brackets allow for easy stacking or mounting to skids or other surfaces. Connect or stack multiple manifolds to handle the busiest worksites. Equipped with safety check valve that reduces hose pressure if a hose is damaged or severed.