Straight Barbell Black, 2 pieces Material: Surgical Stainless Steel Size: Shaft: 12mm Ball: 4mm (Ball size can be changed. Available sizes: 3mm, 4mm, 5mm) You can request different sizes for each piece. If you wish to change the size, please send a message with your desired size after purchase. The number of pieces can also be changed, so please inquire. Body Piercing Metal Allergy-Friendly Tongue Piercing