Metra 82-4400 Speaker Adapters Universal 1/2" Plastic Spacer Rings Depth Extender Pair
Features:
Gives 1/2" extra depth for deeper than normal speakers
Can also be used a perfect circle router guide
Pre-drilled for most component and coaxial speakers
Works with most 5 1/4", 6" or 6 1/2" speakers
Unit Includes:
Speaker Spacer Rings