Gives 1/2-Inch extra depth</br>Works with most 5 1/4-Inch</br>Made of steel for a solid and long lasting fit</br></br>Product Description</br></br>Metra 82-4400 Universal 1/2- Inch Plastic Spacer Rings for 5 1/4 and 6 1/2- Inch Speakers</br><br/>http://www.amazon.com/gp/product/B0007WTEXK