Amazon.com: Universal 1/2 Inch Plastic Depth Ring Adapter/Spacer for 6.5" Car Speakers : Electronics
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
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
2pcs 6.5" 6.5 inch Aluminum Speaker Ring Speaker Mounting Spacer Rings 19mm High | eBay
2 Pcs 8" to 6.5" Solid Aluminum Speaker Mat Speaker Ring Mounting Spacer Rings | eBay
Universal Black 1/2" Plastic Depth Ring Adapter Spacer 6.5" for Car Sp – JSP Manufacturing
Metra Mounting Ring for Speaker Black 82-8148 - Best Buy
Car Audio Modified Speaker Mount Pad Ring 6.5 Inch Aluminum Alloy Washer For Volkswagen New Magotan Sagitar Tiguan Skoda Octavia - Speaker Mounts - AliExpress
10 Pair 6.5" MDF Speaker Ring RING-6.5R Speaker Mounting Spacer Rings 20 Pack - Best Connections, Inc.