Specifications tennis chain width:4mm. tennis chain length:18inches chain. Setting Type We use brass as base material which can do prong-setting as real gold and diamond so. All of our tennis chains use prong-setting, not glue setting. So you can see that diamonds inlaid in the tennis chains are neatly arranged. Prong-setting makes products more bling shine and assures no stone falling. AAA+ Cubic Zirconia Every Cubic Zirconia stone is hand-selected AAA+ quality, which is totally clean and transparent, similar shining with real diamonds. We adopt 0.3um gold plating for 5 times, so it won't turn your skin green It can ensure each tennis chain reflects plenty of light to create that bling-bling effect. Satisfaction&Guaranteed 30-Day Money-Back Guarantee or Exchange. We provide 60 days money-back guarantee(replace or refund) for any reason. If you're not completely satisfied, please feel free to contact us.