Sleek Contoure Design accommodates 6 1/2" speakers and come pre drilled with two half inch holes for the binding post's.  The cans are made of 1/8” polished aluminum and have an 7 1/2” outer diameter. The mounting brackets are made of solid polished aluminum and are securely welded to the can. This kit comes with two cans two clamps and two binding posts, just add your favorite speaker.