Necklace Cords and Extension Chains Set - D58 - Two 16" Black Silk/Satin Cords AND 2 Pcs of 2" and 2 Pcs of 4" Extension Chains ~ Silver Tone Plated - SET OF TWO (2) CORDS and FOUR (4) EXTENSION CHAINS Set contains 2 16" silky-satin necklace cords and 2 Pc each 2" and 4" necklace extenders Cords measure 2.5mm in thickness Use cords to hang your favorite pendants.. Clip extenders to your favorite necklace to lengthen it.. Perfect set for the necklace lover!!