Material: Made of acrylic and 316L stainless steel bar which is allergy safety,nickel & lead and acrylic ball. Size: Bar Thickness: 14G (1.6mm),Wearable Bar Length: approx. Muti-Purpose: The UV tongue ring is not just wearing on your tongue,but you can also use it as nipple ring,lip ring,earring ring,belly ring,nose ring,body piercing ring that you would like to wearing it.