Both the Girls Rule logo ball and the plain purple glitter ball unscrew, so they be used on any 1.6mm (14g) straight barbell.
Bar - 1.6mm (14g) 316L Surgical steel
Length - 16mm (5/8")
Balls - 8mm Logo Ball, 6mm Plain Ball
Design - Plastic
Colour - Purple
Only suitable for use in healed piercings
Range - Logo Tongue Bars