THREE (3) Necklace Cords For Pendants - One each 16", 19" and 20" + 2" Extension Chain on Each - Black Silk / Satin ~ Silver Tone Plated Ends (FB90) Made of a shiny silk/satin material.. Necklaces measure 16", 19" and 20" long and 2.5mm in diameter.. 2" extension chain allows for greater versatility.. Perfect to hang your favorite pendants on..