Clearly block open confined space access hatches with this bright, cross barrier and warning sign. Striped diagonally in warning red and white, and with a warning sign that reads "DANGER, CONFINED SPACE ENTER BY PERMIT ONLY", the sign lets you meet OSHA requirements for confined space labeling. Slits in the diagonal barriers allow easy attachment to a hatch up to 38 in. wide (bolt to bolt), while the barriers themselves can rotate and pivot for easy transport and packing. Built from strong poly-carbonate, the sign is lightweight and strong, ideal for harsh industrial sites.