The Klipsch ME650C is a specially designed in-ceiling 6.5" speaker enclosure. It is manufactured from high-grade cold-rolled steel and features a layer of insulation. It exceeds the one-hour fire-rating requirements and is designed to meet UL2043 requirements for installation in plenum spaces. It fits 16 or 24 inch stud spans. It also comes with all of the hardware needed for most installation applications and has pre-drilled holes to simplify the installation process.