This pair of 6-1/2" indoor/outdoor 2-way speakers have a polypropylene cone woofer with a rubber surround and 1" metallized mylar dome tweeter. These speakers can produce up to 85W maximum and have a built-in bypassable, multi-tap (4W/8W/16W/30W/8ohm) 70V transformer. The speakers have an ABS plastic enclosure with aluminum grill and corrosion-resistant nickel plated push terminals. Yoke-style mounting brackets and stainless steel hardware are included. Dimensions are 11" H x 8.25" W x 8.75" D.