9.5 mm (3/8") wide Tungsten Chain Bracelet & Necklace Gold Ion Plated – 8", 9", 10",18", 20", 22”, 24", 26" & 30" 22” weights about 230 grams24" weights about 260 grams Mirror-Polish Finished Solid tungsten carbide, cobalt free. Never Scratch and Corrosion Resistance. The only way to scratch it is with a diamonds coded polishing wheels. Tungsten is the only rare and exotic metal that can be permanently polished. Tungsten carbide is the hardest of all metals, about 10 times harder than 18K Gold, 5 times harder than tool steel, and 4 times harder than titanium is equal to a natural sapphire's hardness. It is polished to a perfect mirror finish using diamonds coded polishing wheels and unlike other metals; it can retain the exact polish for life time.The Gold Plating is called Ion Plating or IP plating which s one of the newest and most advanced plating now available. It produces a harder and more durable coating with a higher brightness than that produced through traditional plating methods. Experiments have proved that the plating obtained through IP plating is five to eight times better than that obtained through conventional methods in terms of wear and corrosion resistance. As long as the tungsten does not in contact with chemical, like acid, at all time, the plating will last for long time Secured Stainless-Steel Lobster Lock. Regular Retail for 20" is $399.99, Special Discount at $119.95 Great for gift!Free Shipping for USA buyers. We are located in Los Angeles, California and we ship fast!We recommend buyer to buy insurance for all USPS First Class Mail Package.We provide 30 days no-question ask return guarantee!Buy with confidence, Please see our 100% feedback!