DuraVent DuraTech All-Fuel Chimney Round Ceiling Support Trim Collar - For 5" and 6" Inner Diameter DuraTech: A vent pipe with a 6" inner diameter is required for this unit. One of the most important components of properly erecting a chimney, according to DuraTech, is ensuring that it has all of the necessary support. In their All-Fuel Chimney Round Ceiling Support Trim Collar - For Chimney Pipes with 5" and 6" Inner Diameters, you have an item that is designed to make sure that your chimney does not move around, staying in place, and ensuring that your chimney will remain viable for a long time to come.

Conceals space between chimney pipe and Round Ceiling Support Sleek black finish For use with 5" and 6" DuraTech chimney pipes Limited lifetime warranty