1、3 Sizes: Contains a total of 3 pairs of earplugs, each of 3 different sizes, which can be used by different groups of people, flexible, replaceable and detachable. 2、Compatible: These earplugs have a standard 4.5m/0.17in wide opening and are compatible with earphones that use 4.5‑6.5mm/0.18‑0.26in sound holes (most earphones). 3、Comfortable: Replacement eartips head made of silicone material, very soft, ergonomic design, can provide stability, long lasting comfort, not easy to deform, durable. 4、Noise Isolation: This earphone eartip can effectively block excess noise, bring a deep and stable, rich bass, stable sound transmission, and further upgrade your wearing experience. 5、Perfect Replacement: Two color spiral pattern silicone earplugs, aiming at replacing any damaged, scratched, defective or missing earplugs, give new life to your earphones.