This is a 3 piece set of silver reversible herringbone chains. One side is a smooth “X” link and the other is an intricate filigree pattern.  All are .925 silver, Italy and I.C.S. stamped on them. There are 2 necklaces in this set. The longest is 20″ long, 4.45 mm wide and weighs 10.9 g. The other is 18″ long, also 4.45 mm wide and weighs 9.6g and the matching bracelet which is 7″ long, 4.45 mm wide and weighs 3.9 g. The total weight of these 3 pieces is 24.4 g. All are in excellent condition. Well taken care of.