Package Include: 4PCS UV Soft Bar and 6PCS Replacement Opal Top. You could change the tops of the labret studs freely and gives you more options for everyday wear.Material: Monroe piercing retainers are made of flexible bioflex UV. Hypoallergenic, Nickel and lead free. Highly polished smooth surface. Durable, comfortable for long time wearSize: Lip stud: 16 gauge (1.2mm), Bar length: 6mm, 8mm, 10mm, 12mmWhen do exercise, surgery, MRIs and more, the clear piercing retainer can keep your piercing from closing. Easy to put in and not easy to lose, bioflex also comfortable to wear.Multiple Using: Can be used as labret monroe lip piercing, medusa piercing, tragus piercing, helix piercing, conch piercing, forward helix piercing, cartilage earrings, etc.