Pair (2pcs) 800 Watts Titanium Compression 1.35" Screw-On Horn Driver Tweeter 1.35" voice coil / 13oz. magnet 800 Watts PMPO / Titanium dome Sensitivity: 100dB (W/M) / Frequency response: 1.5KHz - 18KHz Thread size: 1/ 0.375, Diameter: 34.2--34.3 mm, Impedance: 8ohm Pair (2pcs) of 1.35" Voice Coil Compression Driver