PHILADELPHIA — Surging prices for a range of raw materials, including steel, rubber, fuel, plastics, and other petroleum-based products, are cutting the profits of Philadelphia-area manufacturers that are increasingly passing on their higher costs to customers, executives said.

Efforts to absorb the costs through internal efficiencies have not always succeeded in maintaining profit margins, and some companies that have so far avoided increasing their prices are now saying it’s only a matter of time until they do.

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