1.How to Select the Right Car Speaker Ring Spacers
Check the vehicle owner's manual: The speaker size is sometimes listed in the audio system or specifications section.
Online Lookup: Visit well-known North American car audio accessory websites, enter your vehicle details - year, make, model, trim level. The site will precisely list your factory speaker dimensions and recommend perfectly matching speakers and installation accessories.
Manual measurement: Remove the door panel and directly measure the diameter of the factory speaker ID and the mounting hole spacing, please know this adapter is factory 6.5 speaker spacer.

2.Solid Car Speaker Ring Parameters
Outside Diameter: 169mm - 6.65 inches
Inside Diameter: 149mm - 5.87 inches
Height: 21mm - 0.83 inches

3.How to Install
Screw the car speaker to the plastic adapter ring and screw it back on car's door or other mounting places that you need.
If you want a better sound effect, please purchase the extra speaker foam rings to seal.

4.What's in Package
2 x 6.5 Inch Rear Speaker Adapter Spacer