This post ear nut component is made of hypoallergenic stainless steel and has a 12mm diameter plastic base for comfort and ease of use.
It has a 1mm hole for the post. Most posts are 20 to 21 gauge and will fit perfectly into the earnut.?
This makes a great earring back for all of your post earrings.
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Post Ear Nuts, Padded Base, Stainless Steel Earring Findings, Lot Size 100 Pieces, #1362