RE Audio TW25 1.1-Inch Soft Dome Tweeters - Set of 2 28 mm Oxygen-free Pure Copper Voice Coil, Hexatech Aluminum Voice Coil Former, UV-treated Open Weave Silk Dome Diaphragm Low-Viscosity Ferro-Fluid Cooling, Highest Grade Neodymium Magnet Low Resonance Frequency - 1,500Hz, Custom Back Wave Canceling CNC Aluminum Enclosure, Wave Guide Front Baffle for Optimal Dispersion Power Handling - 200W[Max]/100W(RMS)