This happens during the production process. The main reason is that the module is too small for stamping 925 or 990. What is Sterling Silver .
925 Sterling Silver Leather Cord End Cap Connector w/ Hook Clasp for Bracelet
925 Sterling Silver Leather Cord End Cap Connector w/ Flower Imprint Shiny
925 Sterling Silver Leather Cord End Cap Spring Clasp BraceletNecklace Connector
925 Sterling Silver Leather Cord End Cap Necklace Bracelet Connector Finding DIY
925 Sterling Silver Leather Cord End Cap Bracelet Rope Finding 1mm 1.5mm 2mm 3mm
925 Sterling Silver Leather Cord End Cap Bracelet Rope Finding 1mm 1.5mm 1.7mm
