DuraVent DuraVent 7" Inner Diameter - DuraPlus Class A Chimney Pipe - Triple Wall - 18" Round Ceiling Support

DuraPlus Collection 7" Class-A Round Ceiling Support BoxThe DuraPlus 7" Class-A Round Ceiling Support Box from the DuraPlus Series is used to support chimney pipe and provides a positive connection between support box and chimney with a built-in twist-lock. Supports up to 35’ of DuraPlus Chimney. Use adapter to attach DVL or DuraBlack to the support box. Painted black. Trim collar included.Features:Dimensions: 18" x 18"Inner Diameter: 7"Outer Diameter: 14"Thickness: 3"Built-In Twist-LockSupports Up To 35...