There is a good variety of colors in the box (my box is now in order of color not order of how they came in) - this is my favorite part. I'm not a wire expert but I suspect they are around 20 gauge so they are easy to open/close (which is good for my purposes) but I wouldn't use them in a load bearing structure due to this. . As mentioned in some other reviews they are grouped and there are also a few rings in the works,
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