Product ID: 32989317 Marvel Iron-Man Arc Reactor Adjustable Ring Set Now you can wield the power of Tony Stark's Iron Man armor tech with this set of Arc Reactor rings! Durable base metal rings with glow-in-the-dark colored enamel inlay. Each of the five rings in this set depicts a unique Arc Reactor design, including those used with the Iron Man armors Mark I, Mark II, Mark III, Mark VI, and Mark VIII. Ring set comes in an attractive Marvel branded clamshell box emblazoned with the Stark Industries logo. Adjustable rings; one size fits most. Inner Diameter: 19.7mm Width: 17mm Thickness: 1.5mm Brass Imported Item cannot be shipped to P.O. Boxes