1.How to Select the Right Door Speaker Spacer Adapter
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.
A: If the measurement is 128mm-5.04inches, you will almost certainly need spacer with a 146mm-5.75inches inner diameter.
B: If the measurement is 131mm-5.16inches, you will need spacer with a 149mm-5.87inches inner diameter.

2.6.5 In Factory Speaker Adapter Parameters

Hollow Speaker Spacers
Outside Diameter: 167mm - 6.57 inches
Inside Diameter: 149mm - 5.87 inches
Height: 20mm - 0.79 inches

Foam Speaker Gaskets
Outside Diameter: 191mm - 7.52 inches
Inside Diameter: 142mm - 5.6 inches
Height: 25mm - 0.98 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.
Simply clean the surface, peel off the adhesive protective film of foam adapter, and press the ring into car speaker place

4.What's in Package
2 x 6.5 Inch Plastic Speaker Adapters
2 x 6.5 Inch Foam Speaker Adapters