Cupronickel bar

Cupronickel Bar is a members-only item on the OSRS Grand Exchange in the bars category.

In-game examine text: "It's a bar of cupronickel."

It has a Grand Exchange buy limit of 10,000 every four hours, a high alchemy value of 16 gp, and item ID 32892.

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Cupronickel Bar shows an active flip setup with a margin of +45 gp and 40,000 trades over the last 24 hours.

At the buy limit of 10,000 every four hours, max profit per cycle is about 450.0k gp — high margin with healthy liquidity.