The NFT is associated with a STL file that will allow to create a real ring in the appropriate measure. Contact us via Twitter to order the size of the ring. STL (Stereo Lithography Interface) DPM (Different Printing Materials) Gold, silver, brass, bronze, steel, titanium, alumide, polyamide, rubber, polypropylene, resin and more materials. The NFT "BITRINA" belongs to a series of 30 units. Serial Number : CJS 003 BIT 030