The TrueFidelity Ear Tips are the perfect companion to your 64 Audio Universal-Fit Earphones. They offer complete acoustical transparency and dont get in the way of the IEMs original sound signature. The ear tips are made of a high-density foam for durability and easy maintenance. Get the most out of your earphones today and hear the music as it was intended to be heard. Fits 5mm stems. Package comes in three pairs of selected size: large, medium, small.