The latest concept in Body Piercing - Flexible Bioplast&#153 Eyebrow Barbells ? Bioplastic is increasingly the preferred material over Surgical Steel and Titanium as the flexible barbells allow for a more comfy fit, and they are hypoallergenic causing less irritation, swelling and infection. The two 3mm UV Balls contain silver glitter to add a sparkle to your brow, and the balls are UV reactive so they light up in the clubs under UV light! Available in a variety of colors to match your wardrobe and mood! Barbell Size: 16 Gauge (1.6mm) Barbell Length 5/16? (7.9mm) Brand: FreshTrends Age: Adult Condition: New