Specifications: Condition: Brand New Material: Silicone Type: Round Color: Random Size: One Size Outside Diameter: 14mm Inside Diameter: 8mm Thickness: 5mm High quality Silicone material will have a great effect on non-slip. This ear hook is perfectly fit for those who always do excercise like playing basketball. It is a universal problem that glasses are easy to fall down when they are doing exercise. This hooks will definitely solve this problem. It is soft and elastic that will not discomfort your ears. Fit for almost all kinds of glasses. Invisible, reusable, stable, effective. Package Included: 10pairs x Retainers (random color) Notes: Other accessories demo in the picture is not included. Due to manual measurement, please allow size differences about 1-2mm. Due to the light and screen setting difference, the item's color may be slightly different.