Note: If there is some gap after installation, you can install foam between the gasket and the metal plate. The 6X9 speaker ring bracket made of durable ABS plastic and good craftsmanship for durability and practicality. Easy to install. Utilizes existing vehicle mounting points, and requires no cutting or drilling. Speaker Ring Bracket Diameter. The universal car speaker spacers fit most vehicles with factory 6" x 9" speakers. Thickness: 25mm/1". (Dimensions refer to the image.). 6×9 inch speaker spacer adapter use to upgrade your vehicle factory speaker with aftermarket speaker into the factory locations, provides better sound quality. 6X9 speaker ring adapter is to replace an old speaker bracket or abnormal noise car speaker gasket adapter in the vehicle door.