Clearsonic AL7266 72" Wide x 66" Deep 3-Section Hinged Acrylic Lid SystemClearSonic AL7266 Overview The ClearSonic Lid System is designed to substantially reduce sound that would normally escape upwards and is especially helpful in spaces with high ceilings. In most cases, the lid system consists of three sections, a center section that comes with a support bar and two side sections. The Clear Lid is a complete 5. 5' x 6' three section, hinged acrylic lid system, that requires two support bars due to its great weight when