The loop chain is a perfect chain for charm necklaces, charm bars, and jewelry-making businesses. Featuring two jump rings on either side of the classic loop chain, this chain will perfectly fit any connector charm, leaving your customers satisfied and accessorized with a new creation from your store! Make sure to check out our charms and pendants to finish your creations! • Waterproof, Non-tarnish, Hypoallergenic • Polished 18K Gold PVD 316L Stainless Steel We use the process of PVD Coating our 18K Gold chains over surgical grade 316L stainless steel for a non-tarnish, hypoallergenic finish that will hold up best to everyday wear and will never turn your customer's skin green. PVD coated jewelry is more resistant to corrosion and signs of wear than gold plated and gold-filled jewelry, making it ideal for daily wear. Approx. Weight: 2.26 grams(16+2") / 2.43 grams(18+2") / 2.57 grams(20+2") Approx. Width: 1.5mm