Pella 150 Series New Construction 31 1 2 in x 47 1 2 in White Vinyl Low e Argon Double Hung Window Full Screen Included Touchless 1800 Watt Dual 4 Ohm Voice Coil 1800 Watt Dual 4 Ohm Voice Coil Car Audio Subwoofer can handle 1800 Watt (3600 Watt per pair) of max power and 900 Watt (1800 Watt per pair) of RMS power greener lawn in spring 49 Grid Type N A Tilt Mechanism Flush High Altitude Rated No Tilting Yes Impact Resistant No Ventilation Latches Double Insect Screen Included No Wood Jamb Extension None J Channel N A Warranty Warranty Limited lifetime Hidden balance and tilt latch mechanisms ensure smooth and precise functionality as well as a polished appearance