Size: 7". Product Dimensions: 16" W x 1/2" H x 16" D. 2" clearance to combustibles: A venting pipe with an inner diameter of 7" is required for this unit. There aren't any locking bands or mechanical fasteners needed. For round support boxes with a diameter of 7", trim the collar. For an extra margin of safety, the inner wall is 25% thicker than competing chimneys. Designed for normal continuous operation at flue gas temperatures of 1000 degrees Fahrenheit. For use with wood stoves, fireplaces, furnaces, boilers, ranges, water heaters, and other wood, coal, or gas-fueled appliances. Have the aesthetics of your piping in your home been less than ideal? Are you looking for a way to conceal your pipes from curious eyes? Then this Trim Collar from DuraVent's DuraTech collection is ideal for you! When used with roof support, this device will completely conceal the gap between your chimney pipe and the ceiling cutout. So, if appearances are important to you, make your move now!

Size: 7 Inch Product Dimensions: 16" W x 1/2" H x 16" D 2" clearance to combustibles No locking bands or mechanical fasteners required Trim collar for round support boxes with 7" diameter Inner wall is 25% thicker than competitive chimneys for an extra margin of safety Designed for normal continuous operation at 1000 degree Fahrenheit flue gas temperatures For use with wood stoves fireplaces furnaces boilers ranges water heaters or other appliances fueled by wood oil coal or gas