Bose 201, 401, 6.5" Speaker Foam Surround - A65Single piece foam surround (Enough for 1 speaker) Some of the models that use this foam include : Bose: 2. 2, 201, 401, Interaudio SA 200, Studiocraft 110, 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 Surround Repair Kits category. Foam Dimensions Surround A65 Bose Outer Diameter 6" 152mm Outer Roll