We regret but have to temporary suspend the shipments to USA

> importers must declare the exact amount of steel, copper, and aluminum in products, with a 100% tariff applied to these materials. This makes little sense—PCBs, for instance, contain copper traces, but the quantity is nearly impossible to estimate.

Wow this administration is f**ing batshit insane. I thought the tariffs would be on raw metals, not anything at all that happens to contain them.

The amount of copper on a PCB is only impossible to estimate if you don't try. Otherwise, you take the PCB copper thickness that you paid for, multiply it by the surface area, and multiply it by a guess of how much remains after etching.