BOSS Titanium is an up and coming company within the industry. Their torch Domeless Nails have become one of our highest rated titanium nails on our site and they just released a new titanium nail to work with E-nails. Their nails fit all three joint sizes - 10mm, 14mm, and 18mm joints and is available in 16mm or 20mm versions to fit the coil of your E-Nail. The nice depth of the cup on this nail allows for you to effectively vaporize any size slab you throw at it. We love the aesthetics of this nail and it's BOSS engravings. If you're looking to upgrade your E-Nail's insert, this is a great option.