Attributes:Cable chainFlatSpring RingSterling silverAppx Weight in Grams by Width/Length: (each item will vary slightly)0.5 mm width: 16 in = 0.74 gr, 18 in = 0.83 gr, 20 in = 0.93 gr, 24 in = 1.11 gr0.9 mm width: 16 in = 1.08 gr, 18 in = 1.22 gr, 20 in = 1.35 gr, 24 in = 1.62 gr1 mm width: 16 in = 1.59 gr, 18 in = 1.79 gr, 20 in = 2 gr, 24 in = 2.39 gr2 mm width: 16 in = 4.09 gr, 18 in = 4.59 gr, 20 in = 5.1 gr, 24 in = 6.12 gr2.75 mm width: 7 in = 2.93 gr, 16 in = 6.69 gr, 18 in = 7.52 gr, 20 in = 8.35 gr, 24 in = 10.03 grOther Specs:Clasp / Connector: LobsterItem Weight U/M: gmProfile Type: FlatChain Type: CableMaterial: Sterling SilverPurity: 925