9 mm Width Tungsten Necklace: 18", 20", 22", 24", 26", 28", 30",34" & 36" Solid tungsten carbide, cobalt free. 24" weights about 260 grams / 30" weights about 330 grams Never Scratch and Corrosion Resistance. Hypoallergenic. The only way to scratch it is with diamond-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 diamond-coded polishing wheels and unlike other metals, it can retain the exact polish for a lifetime. Great Holiday gift idea! Regular retail for 18" is $399, Great discount at $99.95  Free Shipping for US continent locations!  We are located in Los Angeles, California and we ship fast! We provide a 30-day no-hassle return policy!   We recommend International buyers buy the insurance and registered mail.  We don't ship to International PO Box addresses.  Foreign country duty or VAT is the responsibility of the International buyer Buy with confidence, please see our 100% feedback! Please select your length accordingly: 18" to 36" All lengths are approximate. Buy with Confidence! Please see our 100% positive feedback!