Features: Easy Installation：Simplily put the old earbuds and aligning the earbuds with the mounting posts in the headsets earbuds replace easily. From soft and comfortable silicone with significant dustproof effect, effectively blocking noise and ensuring the sound of hearing after replacing the earbuds Scope of delivery：The package contains 3pairs of earplugs. 3 Size: Each size 1 pair, you can choose the perfect size according to your individual ear shape For music enthusiasts elevating their auditory experience, athletes needing secure ear tips during workouts. Specifications: Product Name: Silicone Cover For In-Ear Headphones Applicable Headphones: w300bt and more Noise Cancelling In Ear Neckband Headphones Size: 3 size Set Color:Black,Brown Package Includes: 1Set Eartips note: Due to problems of lighting effect, there might be tolerances in product, please understand. Please allow 0-1cm error due to manual measurement.