This is a ten-piece/five-pair black ear foam sleeve replacement pack for Shure SE115, SE215, SE315, SE425, SE535, E3C, E4C, E5C earphones, which were expressly designed to work with Shure's popular PSM series of wireless and wired in-ear monitoring systems. Whether you're using a PSM system with your house of worship, company, or band, chances are it's getting a lot of use - and due to the personal nature of in-ear monitoring systems, it's great to have an extra set of earphone sleeves around. Make sure you have a fresh set of ears with these reusable and disposable black ear foam sleeves.