PYLE PDS322 1.35" Screw on Neodymium Horn Driver-Set of 1 Throat Diameter: 25.4mm(1 in)Mounting Screw: 1-3/8"-18TPI - Frequency Response: 1.2-20 kHz - Net Weight: 2.03 lbs. Nominal Impedance: 8 OHM - Voice Coil Diameter: 34.4mm(1.35 in) Rated Power: 200 W (RMS) - Diaphragm Material: Titanium