Brand NEW! Including 90 Days USA Factory Warranty. The DS18 TWC are a pair of lightweight, high efficiency tweeters giving you loud and clear sound, even with your factory radio. The TWC are made with a 1-inch silk dome for lightweight, shape retaining properties. The magnet is made of Neodymium and able to handle high temperatures between 80 and 250 degrees C. The TWC also have a low impedance of 4 ohms, a max RMS of 20 watts and a MAX power of 60 Watts. Along with the tweeters, you will receive mounting hardware to help you affix the tweeter the way you want TWC Dome Tweeter 4 Ohm Impedance 20w RMS 60w MAX sensitivity 90dB Frequency response 1K-25KHz Recommended Hi Pas Crossover 3.3UF/50V NP Neodymium Magnet Overall Depth 26.5mm Mounting Depth 14mm Overall Width 43.5mm Overall Height 26.5mm Cutout Diameter 40.5mm - All international buyers are responsible for all tax, duties and/or customs fees.