I ordered this product for a car installation and could not believe how big this unit was . I was thinking it was 4 inch or 5 inch . It is a huge 6 inch with a sealed back cover . I am so happy with this purchase that I am gonna get at least 2 more . I feel that I am really taking advantage of this company . Two quality 6 inch mids for 25 bucks . I spend more than that on a large pizza ! Ha Ha ! What can I say ? Quality products and excellent delivery ! I will be buying all of my speakers from here from now on . Chuck Reed in E-Town Pa.