Two Aluminum Dust Caps for your JBL Speakers. They will replace your old 4 inch aluminum dust caps. The actual diameter of these caps are 4 1/8. The extra 1/8 inch allows this cap to cover your old glue residue from the cap that has been removed. It can also be used on a new cone. Replace your old and dented caps to restore your speaker to like new condition. The caps are correct for your JBL drivers.
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