Choice of pack size available in 10, 20, 30, 40, & 50 piece sets of white or black rubber eyeglass holder ends with silver color electroplated hematite bead tightener. Measures 20mm x 5mm. Use for beaded rope, chain or beaded wire to attach to eyeglasses or sun glasses. Silver Electroplated Hematite Eyeglass Holders, Sets in 10 Piece Increments, Eyeglass Chain, Grip Components, White Or Black Color Rubber