Acoustic Research 4" Speaker Foam Surround Repair Kit - 4 Inch Fits Acoustic Research AR Powered Partner, 2000530, 1200053, 12100530, 1210046, 1210080, 1210095, 1210080-0a, 48 (midrange), 48B, 48BXI, 48S, 58 (midrange), 58LS, 58B, 58BXI, 58LS, 1-MS, 1MS, AV-1, AV1, SAT 600, SAT600, SAT-600, STC, TSW-115P, TSW115 and others that match the measurements Same surrounds that professional reconers use; not cheap Chinese imitations! Complete 2 speaker foam surround installation kit - 4 inch Easy to follow step-by-step installation instructions and videos FREE phone support at 1-800-397-9575 and FREE shipping within the U.S.