Graduated ball details create a subtle climbing effect that gives this cartilage barbell a little movement and a lot of interest. Made from responsibly sourced, nickel-free semi-solid titanium, this 16G flat back barbell comfortably Fits cartilage piercings: helix, forward helix, tragus, conch and flat. Made in hypoallergenic polished titanium that's both lightweight and durable. Gauge: 16 Diameter: 1/4" Height x Width: 11 x 2 mm Fits cartilage piercings: helix, forward helix, tragus, conch and flat.