5 Pairs Sterling Silver 4mm Earring Post Ear Stud with Loop Cubic Zirconia Earnut Backs for Earrings Jewelry Making SS32 Material: solid .925 sterling silver (925 stamped) and cubic zirconia, silver is hypoallergenic material - good for sensitive ears Color: rhodium plating finish to prevent tarnish 4mm (~ 0.16") studs with earnut with closed Loop Post; eyelet ~ 1.5mm; the pin/post attached to the stud is ~ 0.8mm (~ 20GA or 0.03") Quantity: 10pcs=5 pairs, (each comes with earring safety backs or earnuts) Top Quality Sterling Silver Guarantee  All our sterling silver jewelry supplies is coated with a clear protective coating to help prevent silver from tarnishing  Hassle-free returns only if the purchase is made with Adabele. Adabele is a registered brand with the US Patent and Trademark Office. Other sellers with a new listing are not authorized by Adabele to sell this product. They are known to offer counterfeit, imitation products that are not authentic Adabele products.