Internally-threaded, ASTM F136 certified, implant-grade titanium from Anatometal. Please fill out a contact form if you cannot find the the size you need. Ends are not included, this is the shaft only. Be sure to select ends of the proper gauge to match your shaft. Larger gauges are available upon request. Please contact us using the chat if you'd like to purchase a larger gauge. 

Don't forget about Anodization