Item Type: Silicone Earplugs <br>Material: Silicone <br>4 Sizes: L M S XS <br>Inner Diameter: Approx. 3.8mm/0.15in <br>Outer Diameter: <br>L: Approx. 13mm/0.51in <br>M: Approx. 12mm/0.47in <br>S: Approx. 11mm/ 0.43in <br>XS: Approx. 10.6mm/0.42in <br>Scope of Application: the Inner Tube Diameter of This Product is 3.4mm/0.13in, Which is Suitable for Headphones with a Sound Guide Hole of About 3.8mm-5.8mm/0.15-0.23in.1、High Quality Material: The replacement earplug head made of soft silicone material can provide more noise isolation, stability and lasting comfort, durable, flexible, replaceable and detachable. <br>2、Good Sound Quality: Can bring deep, steady, rich bass. It is comfortable to wear, strong, and will not cause sound fluctuations due to the squeezing and deformation of the ear canal. <br>3、Ergonomic Design: Using ergonomic design, long term wearing is not easy to fatigue, wearing comfort is once again upgraded, and it can replace any damaged, scratched, defective or missing earplugs. <br>4、Multi Purpose: The earplugs are suitable for Sony WF?1000XM3 WF?1000XM4, can be put into the charging case, and are also compatible with for beatsX, for Sony, for Senso and most other earplugs. <br>5、Compatible: These earbuds are compatible with over 98% of headphones. With a 3.4mm wide opening. Compatible with headphones that use 3.8mm?5.8mm sound holes. Suitable for Sony and other general brand silicone sleeves.Please allow 0.1?0.2cm/0.04?0.08in error for manual measurement8 x&nbsp;Earplugs