Veritas Memory Foam Earphone Tips Foam Tips (Fits 4mm-5.5mm Diameter Nozzle, Light Grey, 4 Pairs, Medium) Memory Foam eartips for optimal comfort Superior noise isolation Internal elastic barrel for secure attachment fits 4mm-5.5mm nozzles Available in multiple colors and sizes (search Veritas Memory Foam Tips) Height: (10.5mm), Base Diameter S/M/L (10.5mm, 12mm, 13.5mm)