BodyJ4You Steampunk 14G Industrial Barbell Created-Opal 35mm Cartilage Earring Highest Quality, 316 L Surgical Stainless Steel. Measurement: 14 Gauge Length: 35mm (3/8") Purple Created-Opal steampunk Industrial Barbells. Color: Purple Show off with your steampunk style Industrial Barbell, the subgenre of science fiction, technology fantasy and aesthetic designs on this industrial barbell filled with 3 Created-Opal Crystal s.