The OMNI/SantaCruz Collab, E Nail Female/Head Set is made for use with e-nails and is an insert for a 20mm sized coil. This dab nail fits both 14mm and 18mm jointed vapor rigs and glass bongs. This domeless nail has a huge dish for large dabs of your essential oils and legal concentrates. The head screws off to make this titanium nail easy to clean. The 6 hole crown dish design provides increased airflow making every dab easier on your lungs and throat, while the raised center piece helps prevent clogging.