JL Audio 12W3v3-4 12" Single 4 Ohm W3v3 Series Subwoofer Mineral-filled polypropylene upper cone with a metallic JL Audio medallion logo gives the W3's a whole new, classy and sophisticated look NBR (Nitrile Butadiene Rubber) surround Top Mount Depth: 6.65" Cutout Diameter: 11.0625"