Klipsch IK-650-C (Pair) Pre-construction Installation Kit for 6.5-inch Series Speakers Offers increased mounting flexibility for all of our residential in-ceiling speakers that employ a 6.5-inch woofer This revolutionary kit design incorporates a mud ring, breakaway wire tie and color-coded brackets for easy speaker size identification. The kit also comes with perforated metal wings that easily fasten to the studs via screws, staples or nails. Ribbed for increased rigidity, these wings enable a kit to span up to 24 inches easily *This kit is NOT plenum rated.