The new Elite-Ti Hexadab E-Nail Insert is a perfect budget friendly nail that'll pair up perfectly with your E-Nail. We love the fact that this nail will fit all of the pieces you currently own as well as all of your future pieces. It's innovative skirt design allows it to fit ever single joint size - (10mm, 14mm, and 18mm). The nail unscrews in the middle so it can be flipped around to fit male joints on oil rigs, or female joints on waterpipes. It's available in two different versions - 16mm or 20mm cup sizes to fit the coil on your E-Nail. If you're not sure which version to buy for your E-Nail, send us a picture (email@example.com) of your coil and we'll let you know which one to buy.