6" DuraVent DuraPlus Galvalume Wall Thimble - 6DP-WT
This wall thimble adjusts from a minimum of 4 1/4" to a maximum of 7 1/4" wall thickness, and fits between standard wall studs. To accommodate thicker walls, the telescoping pieces can be extended up to 16" with a field-fabricated extension installed. Interior trim ring painted black. Must be installed with DuraPlus chimney pipe horizontally through the wall and extend a minimum of 2" into the room beyond the interior wall.
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.