Advent 5.25" Speaker Foam Surround - A525Single piece foam surround (Enough for 1 speaker) Some of the models that use this foam include : Advent 400 Bookshelf, 401m, Radio, 402, A 1042, A1042, B2R Marbl, B2R Pearl, 2208811, Marbl, Mini, Myriad, Outdoor, 32217, 32270, 2201820, 2201982, 2208931 and others that match the measurements below Same surrounds that professional reconers use; THE BEST QUALITY foam available! This is the foam only. Complete repair kits are available in our DIY Foam