3.8x6.2mm 14K Yellow Gold Rounded Rectangle Link Lightweight Cable Chain, 24 Inches Ready to Wear with Lobster Clasp. The links are made using square 14K gold tubing, which results in a chain with a clean, flat texture and shape that is something between an oval and rectangle. Using sturdy gold tubing rather than wire to make the chain links allows us to keep the price down without compromising strength or quality.