The Clara Crystal Square Rook Earring is crafted from high-quality surgical stainless steel, ensuring durability and hypoallergenic wear. Designed with an internally threaded structure, this elegant barbell features a sleek square crystal that adds a touch of sparkle, making it perfect for rook piercings. All products are nickel-free and hypoallergenic. Item sold singly.  SPECIFICATIONS Gauge: 16G (1.2mm) Post Length: 8mm Material: 316L Surgical Stainless Steel Stone: Ultra Shine Cubic Zirconia Crystal Stone Dimension: 3mm Color: Silver, Gold Internally Threaded MATERIALS 316L Surgical Stainless Steel We use only the highest quality of materials for our customers.  316L is an excellent choice due to its low risk of allergic reaction and strong resistance to water and tarnish. Our stainless steel is nickle-free, implant grade, safe for piercings, and our top-grade rose and gold plating prevents any silver underlay from emerging. Ultra Shine Cubic Zirconia Crystal   Cubic zirconias are famous for reflecting a kaleidoscope of rainbows and colors. We select only the top quality materials to ensure the longevity of our crystals and keep the shiny luster sparkling for a lifetime.