Beautiful bubblegum flat opal internally threaded on to a straight titanium barbell!Material- ASTM F136 Titanium / Lab OpalsLength - 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mmGauge- 14gSize- Opal Top 5mm, ball 5mmInternally ThreadedAnodizing available see chart