18k yellow gold ball stud earrings high polished DIY open bail loop for do it yourself jewelry making findings 4 millimeters attach your own charmFINE QUALITY AND AUTHENTIC - Made of SOLID gold and NOT plated; Nickel free; Stamped as required to authenticate the fineness of the gold; Comes with Certificate of Authenticity so that the recipient can appreciate the true value of the giftcomes packaged in a very special beautiful MASSETE branded giftboxCreate your own jewelry earrings using this ball and post twist open and close loop do it yourself jewelry making just add your charm and close the loopButterfly Closure