Most Americans don’t wake up in the morning thinking about the price of copper. But as prices rise to record highs, Americans might soon feel the pain on some common products — if they aren’t already.

US prices of copper have been on a tear this year due to the fear that tariffs will be imposed on imports of the red metal. Futures prices have hit record highs on New York’s Comex, leading to a premium over the international benchmark in London — similar to the disconnect seen in the gold market.

LME copper prices fell as expectations of market tightness outside the U.S. soften amid looming U.S. import tariffs. At the same time, the spread between LME and New York’s Comex contracts continued to widen.