Laser etched pattern No circuit board, full Mechanical Mod Stainless steel body 510 telescopic pin (silver-plated brass) Bottom lockable firing button SS air control ring Silver plated contacts Outer diameter: 22mm Recessed 510 threading connector Compatible with any device with 510 threaded connector Can be powered by 1*18350 battery/1*18500 battery/1*18650 battery (batteries sold separately)