DuraVent 69878 8DP-CS11 - 8DP-CS11 Dura Plus 811 Support Box & Trim Collar

The DuraPlus 8 x 11 Class A Chimney Pipe Square Ceiling Support Box is used with flat vaulted or cathedral ceilings. Square Ceiling Support Box is painted black. Refer to Ceiling Pitch table to determine size of support box needed. Supports up to 35 of DuraPlus Chimney. Starter Section built in. Trim included. Features Comes Standard with Trim Collar For DuraBlack Ceiling Pitch 0/12-4/12 and For DVL Pipe with Ceiling Pitch of 0/12-6/12Specifications Inner Diameter: 8 - SKU: CPP21649