ROCK RING SET --- RING SIZE 8,5 (USA). The volume of the every ring is 0.37 cubic centimeters. Weight of the finished ring --- Gold 14K 5 grams, gold 18K 5.7 grams, silver 3.9 grams. Possibility of applying blackening. Good details of 3D model. Ring Model is fully ready for 3D printing of plastic, metal or jewelry wax (compatible for all 3D printers). Available for casting metal re-production.