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Amazon.com: Sound Town 2-pack Subwoofer/Speaker Extender Poles with M20 Threaded Lower End and 35mm Adapter, Black (STSD-ADM20B-PAIR) : Everything Else
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10" Subwoofer Speaker Spacers Depth Extender Extending Rings - 3/4" thick - ID: 9 1/8" OD: 10 7/8" - 1 Pair - SSK10XK - Stackable - Perfect For Framing Fiberglass Enclosures : Electronics - Amazon.com
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