3d chain for 3dprint size 3.50 mm ready 3d print stl file ** one chain one piece 19cm** Approximate metal weight 14 karat gold-05.06 grams / 18 karat gold-05.90 grams 21 karat gold -08.10 grams 925 sterling silver-4.80 grams The model is corrected with the RP Magic program and is ready for printing.You can see the full image in the attached picture. Flexible model for casting