Titanium & 24Kt Gold PVD Titanium Threadless Prong Set Marquise CZ 2-Cluster Top. This Threadless Top is made from Implant Grade Titanium TI-6AL-4V ELI ASTM F136 with 25g.►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 tops which can be located on our website once logged in. The certificate includes the heat # & lot # for traceability.urable 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.