This is plain old solder that is 60% lead and 40% tin. I returned it because I was looking for ROHS compliant solder and the only thing listed in the specs was silver which apparently meant silver in color. So I thought I'd save someone some trouble and list their components as the seller thought it would be too difficult to include that information. It gets 5 stars because it's a good product and works as intended, I just wish I could give the seller a bad rating and not the product.
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