"Multi-Pack Glow in the Dark Bioflex Barbells 4 Pack – 14 Gauge". "Hold under direct light for 2 minutes to activate glow Exclusively at Spencer’s Includes: 4 barbells Piercing Type: Multiple Barbell Material: Bioflex Accent Material: Metal alloy Gauge: 14 gauge/1.6mm Length: 16mm Ball size: 6mm Threaded closure Jewelry Care: Clean with antibacterial soap and warm water Piercing Care: Clean with saline solution Imported Note: Do not use rubbing alcohol to clean jewelry. Normal alcohol consumption and/or mouthwash may accelerate wear and tear Do not over-thread... - "Multi-Pack Glow in the Dark Bioflex Barbells 4 Pack – 14 Gauge". | 
