Enrock Harley Davidson Speaker Mounting Ring Adapter for 6.5 Inch to 6.75 Inch (6-1/2" to 6-3/4") Speaker Fits 1998-2013 Harley Davidson Touring Models - Walmart.com
2x JVC CS-DR621 6.5" Car Audio Speakers, Harley Speaker Mounting Ring Adapter 728120462378 | eBay
2pcs High Quality Universal Aluminum Alloy 6.5 Inch Speaker Mount Speakers Pad Adapter Plates Bracket Ring Mat Car Refit 6.5'' - Speaker Mounts - AliExpress
Amazon.com: Universal 1/2 Inch Plastic Depth Ring Adapter/Spacer for 6.5" Car Speakers : Electronics
REAMTOP 6.5 Inch Black Plastic Speaker Adapter Bracket Ring for Nissan/Infiniti
1 Pair 6.5" MDF Speaker Ring (Black) RING-065CBK SPEAKER MOUNTING SPACER RINGS - Best Connections