Powerbass S352 3.5-Inch Coxial OEM Speakers 2-Layer paper, dampening cone woofer UV protected foam Surround Silk dome tweeter for high frequency sound production 4oz magnet structure 4 ohms impedance 90 Watts peak power handling 4-Ohm nominal impedance and 85db efficiency Paper cone woofer with DDC coating - Dynamic Damping Coating 80Hz - 20Khz Frequency Response Mounting depth 1.625-Inch driver cutout is 3.125-Inch Includes speaker wire mounting hardware application guide PowerBass decal