Niloufar-Mirshahidi
nice
Ring sizes inner diameter - 19 mm,
Model volume (for ring size 19 mm): 727,258 cubic mm. Model avalible in STL format for prototyping. Geometry is healed, and fixed all the bad with RP Magics software You can check out my other products by clicking on the author name artchahur. Any questions? Please contact me. Thank you!