• Bore size: 3.6mm, for earbuds nozzle diameter from 4-5.5mm.
• SpinFit’s first model designed especially for true wireless earbuds. Also the first time we do mix size pack, which means you get two sizes in one card.
• ISO10993 certificated medical-grade silicone adopted which reduces allergic reactions and provides a higher hygienic level. While giving you a secured fit, CP360 protects your skin at the same time.
• The patent and material lessen the irritation when you put on the earbuds, just like they are customized for you. Perfect for long-time wearing and exercising.
• Perfectly fit in the wireless charging case

All images shown are for display purposes. The actual product might vary in colors.