This 40 Piece Kit Includes Gold & Silver Plated Necklace Chain Extender Jewelry Repair Findings 30 Gold Plated Necklace Chain Extender This is a new set of 30 gold plated chain extenders They can be attached to your necklace using a jump ring or a split ring Each measures approximately 69 x 5 mm (2 3/4" x 3/16") 10 Silver Plated Necklace Chain Extenders This is a new set of 10 silver plated chain extenders Perfect for jewelry repair They can be attached to your necklace using a jump ring or a split ring Each measures approximately 3" (76 mm) and has a 4.5mm ball on the end