Shure EA306 Triple Flange Sleeves for E3c, E3g, E4c, E4g, E5c, I3, I4c, E3c-n and E4c-n models Replacement sleeves for Shure E3c, E3g, E4c, E4g, E5c, I3, I4c, E3c-n and E4c-n models 3 pair (6 pieces) Replacing your foams often will maximize your listening experience