Veritas Memory Foam Earphone Tips Foam Tips (Fits 4mm-5.5mm Diameter Nozzle, Black, 4 Pairs, Medium) Memory Foam eartips for optimal comfort, lined with a high density elastic for secure attachment Superior noise isolation Fits 4mm-5.5mm nozzles (200/400 series compatible). PLEASE NOTE! THESE WILL NOT FIT ALL HEADPHONES. If you are unsure of your earphone nozzle size, please consult your earphone manufacturer or website. For smaller nozzles, please see the Veritas 2.5mm-3.5mm size foam tips. Available in multiple colors and sizes (search Veritas Memory Foam Tips) Height: (10.5mm), Base Diameter S/M/L (10.5mm, 12mm, 13.5mm)