All of the titanium in our dabbing nails sourced Grade 2 Aerospace Titanium as opposed to US Medical grade. What does this mean to you? For starters it’s the difference of $100 – but in use, you won’t notice a difference. We do not use steel, or other substitute metals – this is g2 titanium. If you ever have an issue with your nail, contact us and we’ll hook you up. We stand behind our products here at Common Object and personally use everything we sell. This titanium dabbing nail will fit 18mm male ground glass joints. For use with a dome.