Mokoo 6 Pairs Silicone Memory Foam Earphone Tips Foam Tips (Fits 4mm-5.5mm Diameter Nozzles, Black, Medium ) (Black) Color: Black Inner hole size: 4mm Good for Headsets' diameter ranging from 4mm-5.5mm Packaging: 6 pairs (12 packs) replacement foam tips Slow shape recovery nature (made by special material which ensures maximum comfort inside your ear tunnel)