Well-made earrings for ladies with delicate ears. Components Surgical grade stainless steel 18K gold plated Free of lead and nickel Always hypoallergenic Specifics Flat screw-back 2.5 mm x 4 mm Super thin post measuring .8mm (20 gauge) Waterproof - perfect for swimming and bathing Pierced Co Extras that you can't find anywhere else 100% guaranteed to be hypoallergenic or your purchase is on the house Each purchase includes a bonus pair of backs