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The 3M 303 is a pre-printed warning marker from 3M that displays the message 'Caution Buried Electric Line Below' to identify underground electrical lines. It functions as a visible label for excavation sites, utility corridors, and construction areas to indicate buried electrical infrastructure. The marker is supplied under MPN 303 and is intended for use where a clear above-ground indication of underground electric lines is required.
Pre-printed 3M warning marker labeled "Caution Buried Electric Line Below" for identifying underground electrical infrastructure.
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