14k White Gold Necklace Extender Safety Chain (1.00mm) Fine Link Curb Chain is 1.00 Millimeters Wide Finished with a Spring Ring Clasp; Crafted in Polished 14k White Gold Inside Dimension of Spring Ring Clasp is 1.00 Millimeters (Check the Measurement of What this will be Connected to) Extension Safety Curb Chain is 2.25 Inches Long A Safety Chain for Watches and Bracelets and an Attachment to Lengthen Chains and Necklaces; Klean Karats Patented Gold Polishing Chamois Included with Order Made to Order Especially for You, Hand-Finished in Approx. 6 Business Days; Happily Made in America