Pyle-Pro PDS111 1'' Neodymium/Titanium Screw On Horn Driver 8 Ohm 1-3/8'' x 18 TPI<div style="text-align: left;"><strong>[Product Information]</strong><ul><li><span class="a-list-item"> Midrange/Tweeter Compression Horn Driver - Sensitivity:99db 1W/1M </span></li><li><span class="a-list-item"> Neodymium Magnet /Titanium Diaphragm - 8 Ohm Impedance </span></li><li><span class="a-list-item"> 1'' (44.4mm) Flat Aluminum Voice Coil - 100 Watts RMS/200 Watts Peak </span></li><li><span class="a-list-item"> 21 oz Magnet Structure - Terminals 205 Type </span></li><li><span class="a-list-item"> Frequency Response:2000Hz-20KHz - Fits Horns with 1 3/8'' x 18 TPI Threads </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41uNGTKbP1L.jpg" noproxy>