Marantz 12" Flat-attach Speaker Foam Surround Repair Kit - 12 Inch Fits Marantz HD-77, HD77, HD-88, HD88, 5G47S, 211-1003-100 (S70319), 18M, 841-1019-100D, 7 MK II, HLM-312, HLM 312, HLM-312B, HLM 312B, IMPERIAL 3, IMPERIAL 8, LS-403, LS403, SP-7022, SP7022, WSP-4112, WSP4112 and others that match the measurements Same surrounds that professional reconers use; not cheap Chinese imitations! Complete 2 speaker foam surround installation kit - 12 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.