A double hoop design gives this clicker a modern edge, because basic is overrated. Made from surgical-grade semi-solid stainless steel with yellow ion plating, this 18G hoop is designed for easy, everyday wear in helix piercings. Made in surgical-grade semi-solid stainless steel with yellow ion plating. Gauge: 18 Diameter: 5/16" Height x Width: 10 x 12 mm Fits cartilage piercings: helix, forward helix, tragus, conch and flat.