beautiful chain or bracelet with lock 3D print model

beautiful chain or bracelet with lock You can see the dimensions of the model on one of the photos presented here.
if the length is 20.5 cm, then the weight of the finished chain is about 20 gr. 14K gold.
There 3dm file for editing and stl for printing. 90% of my 3d models have been checked: made wax and finished product in gold or silver . Model are for 3D printer or cnc machine.High polygonal model. Made in program Matrix+Rhinoceros. Ready for the print.Checked and fixed in program Magics. One link -Volume = 62.5029505 (+/- 1e-08) cubic millimeters Mesh: vertex count = 24927 facet count = 44830