Dual LU43 Three-Way Speakers for indoor and outdoor use. 4" polypropylene woofer with rubber surround. 25mm polycone midrange. 20mm Piezo dome tweeter. UV-treated ABS enclosure with nonremovable aluminum grille. Dual LU43 speakers include multi-angle mounting brackets. 100 Hz - 20 kHz response. 50 watts RMS. 100 watts peak. 8.25"H x 5.25"W x 5.25"D. Sold in pairs. Dual LU Series 3-Way Indoor/Outdoor Speakers, LU43