These speaker adapters are for 1997-2004 Chevrolet Corvette and made from OEM style automotive grade high-temp ABS plastic. They are perfect for 6-inch 6.5-inch and 6.75-inch aftermarket speakers., Accommodates 6 to 6.75 .in Speaker, Adapters Included for Smaller Speakers, Applications: Chevrolet Corvette 1997-2004, Easy to Install, , , , , , , Weight (lb)0.72, Height (in)0.5,Width (in)10,Depth (in)16.25