Nostalgia Audio XWB Silicon Eartips 3 Pairs Per Pack Extra Wide Sound Barrel XWB ear gels are designed to meet the current trend of large diameter sound canal in-ear headphones. The extra wide barrel opening allows sound to travel more directly and smoothly into the ear canal, reducing distortion and unwanted resonance. Whirlpool design The top of the XWB ear gels feature a vortex-like tube design that creates a smooth, consistent airflow, helping to minimize unwanted turbulence and distortion for clearer, more accurate sound. Thick Wall Design XWB earplugs are designed with a specific wall thickness to minimize vibration and resonance effects, providing excellent acoustic isolation and a secure fit, while delivering an outstanding sound performance that will leave a lasting impression. Medical grade silicone XWB headphones are made of medical-grade silicone, which is hypoallergenic and skin-friendly, making them safe and suitable for long-term use. The silicone material is soft and flexible, ensuring a secure and comfortable fit while providing excellent sound isolation. Extra Wide Outlet Design for Better Sound Quality Suitable for in-ear headphones with large diameter sound tubes Medical-grade silicone material for comfort and durability Stable and comfortable fit Anti-allergic and skin-friendly SIze (Please refer to the attached picture): Small S (3 Pairs per Pack) Medium M (3 Pairs per Pack) Large L (3 Pairs per Pack) Specification:  Sizes: 3 sizes for selection (L / M / S ) Dimensions: Please refer to the attached pictures Ideal Inner Nozzle Diameter: around 4.11mm