Black PVD Titanium Internally Threaded Ball Top. ? The Lot # & "JPN" will appear on our label of the bag of jewelry which indicates that it is sourced and milled from titanium directly made in Japan, a DFARS compliant country for titanium. ? We have corresponding mill certificates for these styles which can be located on our website once logged in. The certificate includes the heat # & lot # for traceability. Made from implant-grade titanium Ti-6AL-4V-ELI ASTM F136 and coated with Titanium Nitride (TiN) using the Physical Vapor Deposition (PVD) process. The PVD coating bonds at the atomic level to the titanium, creating a chemically inert and nickel-free surface that won’t flake, leach, or irritate the skin. The same technology is used in medical and aerospace applications for its safety and stability. Titanium Nitride forms an ultra-hard, scratch-resistant layer that becomes part of the metal itself — not just a surface coating. The result is a deep black finish that resists wear, fading, and corrosion for long-lasting beauty and performance.
