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ALLEGRO SAFETY Manhole Signs
AManhole Signs
Allegro manhole signs remind workers to follow proper confined space procedures meeting OSHA's confined space warning requirements. They are made of high impact polycarbonate and fit under the manhole cover. These manhole signs feature ventilation holes that allow air to pass through and water to drain in. The design offers ease of using instrument probes without having to remove the sign from its position under the manhole cover.
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