6" Square Ceiling Support Box

This square ceiling support box supports chimney pipe and provides a positive connection between support box and chimney with a built-in twist lock. Suitable for both flat and cathedral (A-Frame) ceiling applications. Fits between standard 16" on-center joists and most manufactured home applications. Supports up to 60' of DuraTech Chimney. Use adaptor to attach DVL or DuraBlack to the support box. A 2" wide trim collar is included.