The gold color, once deposited, stays bonded to the titanium, and does not flake or wear off. Gold PVD is not the same as gold plating, though the two are often confused, as it is more durable and long-lasting. It has a high resistance to daily wear and tear, and is an attractive, more affordable option to solid gold jewelry. 24kt gold is the purest form of gold.  More information is available in the FAQ section.These Threadless Tops are made from Implant Grade Titanium TI-6AL-4V ELI ASTM F136 with 25g durable Titanium Pin designed to be practical and easy to use. Fitting all sizes of pins and bases in our threadless body jewelry line. Pin Size: 0.45mm x 4.7mm.