Feature: 1. COMPATIBLE: Compatible with for WF‑1000XM3 WI‑1000XM2 SP510 SP900 C600N equivalent sized earbuds that fit in the charging case, and also compatible with for BeatsX, for Senso, and most other earbuds. 2. WIDE COMPATIBILITY: These ear tips are designed to be compatible with over 98% of earbuds on the market. They come with a 4.0mm wide opening. Compatible with earbuds that use a 4.0‑5.5mm outlet hole. 3. COMFORTABLE TO USE: Replacement earbud tips made of soft silicone material provide increased noise isolation, stability and long lasting comfort, durable, flexible, replaceable and removable. 4. IMPROVED SOUND QUALITY: Soft earbud tips fit comfortably in the ear while effectively blocking out unwanted noise. Delivers thick, subdued, richly layered bass without the sound fluctuations that can occur when the ear canal is squeezed and deformed. 5. REPLACE OLD EARBUDS: Replacement earbuds for any damaged, scratched, defective or missing earbuds, giving new life to your earbuds. Specification: Item Type: Replacement Earbuds Tips Material: Silicone Scope of Application: The Inner Tube Aperture Is 4.0mm, Suitable for 4.0‑5.5mm Sound Guide Hole Earbuds 4 Sizes: L, M, S, XS Inner Hole Diameter: 4.0mm/0.16in Compatible Earbuds: for WF‑1000XM3 WI‑1000XM2 SP510 SP900 C600N Equivalent Size Earbuds, Can Be Put Into The Charging Case, Also Compatible with for BeatsX, for Senso and Most Other Earbuds.. Package List: 8 x Replacement Earbuds Tips