ALLEGRO 26" Manhole Sign, Black

Meeting OSHA’s confined space warning requirements by reminding workers to follow proper confined space procedures, these high impact polycarbonate signs fit under the manhole cover. The design allows air to pass through the ventilation holes while also letting water to drain in. You can also use instrument probes without having to the remove the sign from its position under the manhole cover. Available in two sizes while custom sizes and signs are available with volume orders.