Jewelry Findings: Rubber (natural rubber, non-allergenic) necklace, thin to suspend that casual elegant pendant, 4.0mm thick, 18 in long. End caps and clasp are goldplated, Nickel free. If a bead or pendant is to small to slip over the clasp or end cap, cut end cap off, thread beads on the rubber, kautschuk, and then use our item F-EC-GP-40, End Caps, Gold Plated, 4.0mm, Nickel free, to secure (crimp, cement or solder).