350 Watt Aluminum Bullet Titanium Horn Tweeter 1 PairDiamond chrome cutting finish1" High temperature Kapton voice coilFerro fluid enhanced voice coilPower (Max) 350 WattsPower (RMS) 175 WattsFrequency 2K - 25KHzSensitivity 99 dBImpedance 4 OhmsMagnet 20 OzOverall Diameter: 4 inchMagnet Diameter: 3 inchDepth: 2 3/4 inch 350 Watt Aluminum Bullet Titanium Horn Tweeter – 1 Pair Diamond chrome cutting finish 1" High temperature Kapton voice coil Ferro fluid enhanced voice coil MODEL NO - ATR3721