Color: White Rose Gold; Material: Silicone, Metal; Diameter: 4mm / 0.16"; Size: 20mmx6mmx4.5mm / 0.79"x0.24"x0.18"(L*W*Spring length) Advantage: With these eyeglass chain connectors, you can adjust the eyeglass strap's size whenever you want according to your head size. Made of soft material, comfortable to touch, good for people who wear glasses all day. Not easy to fall off, suitable for most types of glasses arms. Instruction: One loop connects to the eyeglass strap and the other loop connects to the eyeglass arms. Application: This eyeglass chain connector is very suitable to be installed on the eyeglass strap which is mainly used to secure your eyeglass around your neck and make sure the eyeglass won't be lost and broken in sports or other situations. Note: Please confirm the size before ordering.