Ring mould

Ring Mould is a free-to-play item on the OSRS Grand Exchange in the other category.

In-game examine text: "Used to make rings."

It has a Grand Exchange buy limit of 40 every four hours, a high alchemy value of 3 gp, and item ID 1592.

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Ring Mould currently has a flip margin of −10 gp, which isn't profitable to flip right now despite 1,073 trades over the last 24 hours.

Items with negative or zero margins like this are better watched than actively flipped until the spread widens.