Make beautiful necklace designs quickly and easily with the 18 inch 4mm interchangeable black rubber necklace. This necklace is made to work with interchangeable beads. Open the magnetic clasp of the necklace and slide an interchangeable bead of your choosing onto the clasp. It will lock in place thanks to the magnet and your bead will be showcased at the center of your necklace. Switch out the beads to coordinate with different styles! This necklace features smooth black rubber that will contrast nicely with any bold bead.