Sony XSGT6935A 6-Inch x 9-Inch Coaxial 3-way Speakers (Discontinued by Manufacturer) 6-3/8 x 9-1/2 HOP woofer cone 2-3/8 H.D.L.D. High Density Layered Diaphragm 1-7/16 Dome tweeter 8-3/4 Mounting Diameter HOP (Highly Oriented Polyolefine) Cone Material