11" DuraVent DuraTech Square Ceiling Support Box - 6DT-CS11
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.
WARNING: Carcinogens: This product can expose you to chemicals including Lead, which is [are] known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.