Sportsheets Midnight Black Jeweled Nipple Clips. The rich black beads are pleasing to the eye, and the 16.5 inches strand reflects even the slightest bit of light in the darkest of rooms. To see them sparkle, and hear the rhythmic rattling of the slender chain is an occurrence everyone should have over and over again. Materials: cubic zirconia, nickel free metal, copper, stannum, rubber. Includes: one 16.5 inches black jeweled nipple clips.