Earplugs from the brand SpinFit. For IEM nozzle diameter from 4,5 - 5,5 mm, made of silicone. Gives deeper & clearer sound and improves sound quality overall in bass, treble, and sound stage.

Compatible with brands: 64 Audio, Accoustune, AKG, Artio, BGVP, BLON, Campfire Audio, Canal Works, CCA, Chord & Major, DUNU, Earsonics, Empire Ears, Fender, FiiO, final, FitEar, HIFIMAN, iBasso, intime, JH Audio, Kinera, KZ, Moondrop, Noble Audio, radius, See Audio, Sennheiser, Shanling, Sony, Tanchjim, Thieaudio, Tin Hifi, TRN, Unique Melody, and more...