10" Polypropylene Woofer (400-1014A) Features Faxback Doc. # 15870 Your Radio Shack 10" Polypropylene Woofer lets you increase the bass response of your sound system, whether it is a home or car, stereo or monaural system. Light, Rigid, Polypropylene Cone - Extra-durable, long-life cone resists effects of moisture and temperature extremes, and withstands greater stress at high volume levels. Rolled Urethane Foam Surround - minimizes distortion and improves clarity. Long-Throw Voice Coil - delivers clean, solid sound. (ALL-07/13/95)