They are made of tin plated steel. This means the cutout edges are raw steel, which can rust.
Hand wash and dry.
Fits any regular mouth Mason jar.
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I absolutely love these with the leaf cut outs. I ordered the copper colored for my line of wax melts and wax air freshener jars. Leaves are my thing; very happy with these!
I loved the leaf cutout lids with the copper bands. They make a nice addition to my fall wedding decor.