Single piece foam surround(Enough for 1 speaker) Some of the models that use this foam include :Altec Lansing Model 3, Model 3 Series II, Model 5, Model 6, Model 7, 101W-2, 301, 305, 30942, 31063, Design 1, 3841, 4142, 501, 505, 510, 511, 874A, 886, 891A, 891B, 891V, A 0035, Bias 550, Image 10, Image 20, PSW-10, Segovia, W10869, W157488, W801719, W804905, A0471, A0035 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 A10-Altec Outer Diameter 9.75" - 248mm Outer Roll Diameter 8.875" - 225mm Cone Diameter 7.75" - 197mm Inner Diameter 7" - 178mm Roll Width 5/8" - 16mm Inner Attachment Angled