Sterling Silver Box Chain Necklace 1mm Antiqued Finish Nickel Free Italy, Sizes 16 & 18 inch Made with flat wire, Box Chain is Square Shape, Light weight but a Very Strong Silver Chain Solid Sterling Silver Made in Italy with excellent quality Antiqued Finish to match the color of older charms and pendants NICKEL FREE Hypoallergenic This is Box Chain is strong enough for most pendants about I inch in size