Pierced Owl Set of 10 Clear Acrylic Septum Ring Retainers, Metal Free, Allergy Free Set of 10 clear acrylic septum ring retainers Made of comfortable, lightweight acrylic Non-toxic, non-metal, and allergy free Available in 16GA (1.2mm) and 14GA (1.6mm) Ideal for work, surgery, MRIs, and any time you need your piercing to be discreet