Here is the rewritten description in 400 characters, segmented: This 10k gold extender chain is crafted from solid, unplated material, not just a covering. It is nickel-free, lead-free, hypoallergenic, and highly polished, ideal for sensitive skin. It will not turn skin green or red. Each piece is trademarked with au417 g10k 10k purity. The extension chain is small but strong and durable. This is a separate sale item. Choose your length carefully: 1, 1.5, 2, 3, or 4 inches. Note this light chain is not suitable for very thick chains. It features a secure spring clasp for easy use. Use it to lengthen necklaces, chokers, bracelets, or anklets year-round. Each chain comes professionally packed in jewelry packaging, ready for gifting.