Single piece foam surround (Enough for 1 speaker) Some of the models that use this foam include : Infinity 902-1187, 902-2680, 902-4477 (P/N 028-4505), 902-5562, BU-120 Powered Subwoofer, BU120 Powered Subwoofer, BU-2 Powered Subwoofer, BU2 Powered Subwoofer, Monitor, Monitor 2, Monitor 2A, QLS, RS-4.5, RS4.5, RS-5000A, RS-5000A, SM 12GCF (333512-001), 2002, 5000, 490701, 2000A, 3000B, 3000P, 4000B, 333512-001 and others that match the measurements shown Same American-made surrounds that we use in our professional repair facility; NOT cheap Chinese copies!! This is the foam only. Complete repair kits are available in our DIY Foam Surround Repair Kits category. Surround A12B Outer Diameter 11.75" - 298mm Outer Roll Diameter 10.625" - 270mm Cone Diameter 9.25" - 235mm Inner Diameter 8.5" - 216mm Roll Width 3/4" - 19mm Inner Attachment Angled How To Center Your Voice Coil Using Smartphone or Tablet