Industrial Barbell 316L Surgical Steel with Faux Bubbles and Howlite Stone In the center of the barbell, two dome shaped Purple resin bubbles with a gloss shine sitting on each side of the Howlite while complementing the natural look of this stone in shades of white with crackle black lines with a stunning smooth satin finish. Material : 316L Surgical Steel, Howlite Stone, & Resin Thickness : 14GA / 1.6mm Length: 1 & 1/2 / 38mm Ball: 5mm Exceptionally High Quality Jewelry!