Description OVERALL DIAMETER: 177.0 MILLIMETERS NOMINAL POWER RATING: 150.0 WATTS NORMAL IMPEDANCE RATING IN OHMS: 4.0 ARMATURE COIL NOMINAL PART NAME ASSIGNED BY CONTROLLING AGENCY: 2-WAY MARINE SPEAKERS SPECIAL FEATURES: INCLUDES 2 X SPEAKERS, 2 X TINNED SPEAKER WIRE, 8 X STAINLESS STEEL MOUNTING SCREWS, MOUNTING PLATE, 2 X MOUNTING CASKETS, USER MANUAL AND WARRANTY CARD; 6 INCH WOOFER SIZE