Metal, Glass, Perfection The unrivaled Prometheus Pocket design has been carefully engineered to fuse all the benefits of a premium glass pipe with the durability of Aircraft-grade Aluminum. This is a 14mm male joint that replaces the normal bowl. You can drop a domeless nail on this or nail and a dome, or you could just put a dry herb bowl on it if it was female. It's your life, we won't judge. Specs: Length: 2" 14mm Male Joint for Prometheus Pipe