Video Conf. Set-Top Mounting Kit for mounting over to top of 42-60in. Plasma screens includes telescoping pole and shelf. The Plasma Set-Top and PTZ Camera Mounting Kit include telescoping extension tubes that allow for adjustment between 42in. and 60in. . Cables can be run through hollow extension tubes and either a Set-Top Shelf Kit or PTZ Camera Shelf kit is included for mounting videoconferencing equipment atop the extension arm.