This is a bright and cheerful maternity belly button ring made with a flexible clear PTFE shaft with a 316L high grade surgical steel ball bead on top that is 5mm & bead with glass painted ball on the bottom that is 8mm. The glass balls come in variety of colors to choose. Item sold individually. This navel ring measures 14 gauge and 20mm- 13/16 of an inch. Entire piece is nickel free. PTFE is a material that is non-allergenic, flexible, non-magnetic, invisible to x-ray machinery, and autoclave safe.