Titanium—also present in meteorites and the sun—is fashioned into a two-tone ring that's tough enough to withstand their active lifestyle! It's sleek black inside and out, with a satin-brushed silvery strip in the center. 7mm (1/4") in width. Personalize the band with up to 25 letters and spaces outside and up to 25 letters and spaces inside.Titanium is extremely strong (3 times stronger than steel) yet much lighter weight. Commercial pure hypoallergenic 98% nickel and lead free, also highly dent & bend resistant.