Universal Black 1/2" Plastic Depth Ring Adapter Spacer 6.5" for Car Sp – JSP Manufacturing
2x JVC CS-DR621 6.5" Car Audio Speakers, Harley Speaker Mounting Ring Adapter 728120462378 | eBay
2pcs 6.5" Inch High Quality Aluminum Speaker Ring Speaker Mounting Spacer Rings | 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
1 Pair 6.5" MDF Speaker Ring (Black) RING-065CBK SPEAKER MOUNTING SPACER RINGS - Best Connections