11" DuraPlus Square Ceiling Support Box is used with flat, vaulted, or cathedral ceilings. Square Ceiling Support Box is painted black. Supports up to 35' of DuraPlus Chimney. Starter Section built-in. Trim 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.