JBL 4.9" Control 1 Speaker Foam Surround Repair Kit Some of the models that use this foam include: JBL Control SB1, PRO 3, J520, MR25, Control 1 and others that match the measurements above. Complete 2 speaker foam surround installation kit - 4.9 inch Same surrounds that professional reconers use; NOT cheap Chinese imitations! 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.