Threadless Top Ball comes in 2.5mm, 3mm, 4mm and 5mm ball size and fits into any Invictus threadless barbell or base. Manufactured from High Polish Implant Grade Titanium (Ti-6AL-4V-ELI ASTM F136). To secure the inside bar or base, add a slight bend to the pin by simply inserting the pin half way and pushing the top to one side. Pin Size: 0.45mm x 4.7mm.?We are transitioning our material to Japanese Titanium. Several of the colors/sizes have been updated already to Japanese Titanium. The Lot # & "JPN" will appear on the label which indicates that it is sourced and milled from titanium made in Japan, a DFARS compliant country for titanium.?We have corresponding mill certificates for these Barbells which can be located on our website once logged in.The certificate includes the heat # & lot # for traceability.
