14k White Gold Chain Necklace 1mm Extender Safety Chain 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 2.50 Inches Long A Safety Chain for Watches and Bracelets and an Attachment to Lengthen Chains and Necklaces Happily Made in America