DB Drive K912D2 Okur Series Subwoofer: * 3" voice coil * 4 layer DVC with aluminum former * Non-transfer paper cone with NBR rubber surround * Dish style VAC aluminum dome with laser etched logo * 165 oz Y30 magnet * Black electro-plated finished plate and yoke * Powder-coated die-cast aluminum frame * Mixed spider * Spring terminals * PVC trim ring/gasket * Size: 12"