Package Includes: You will receive 40 pcs eyeglass chain ends, including 20 pcs black and 20 pcs white eyeglass chain ends, and eyeglass chain end of every color has metal coils in golden and black, sufficient quantity for you to use for a long time. .High Quality Material: The glasses chain ends are made of stretchy silicone and sturdy metal, not easy to break down, durable and reusable. .Adjustable: The eyeglass chain end measures approximately 2cm in total length and the metal coil is 8mm long, the metal coil can be moved to adjust the grip on their eyeglasses and fit for most eyeglasses' arms. .Easy to Use: Just slide one side of silicone ring up the arm of glasses, and fasten the other side onto the chain or DIY decorative necklace. These spectacle chain connectors can prevent your eyeglasses from accidentally falling or losing. .