The Multi-Nail is the first fully adjustable and convertible domeless titanium nail. This one size fits all design works with 14 mm male, 14 mm female, 18 mm male, and 18 mm female ground joints. The Multi Nail Nail is composed of 5 pieces which fit together in a flush closed assembly. The parts are removable and interchangeable allowing you to select what style of domeless nail you need for your application. The Multi-Nail makes the use of traditional vapor globes and glass adapters a thing of the past. This one nail will fit any 14 or 18 mm ground joint and is ideal for anyone who enjoys convenience and functionality.