Allowable Flue Gas Temperatures
Max Continuous 650°C (1200°F)
Brief Forced Firing 925°C (1700°F)
Tested To 1150°C (2100°F)

Clearance to Combustible Materials
ULTRABlack is certified for 6" clearance with the following exception. When ULTRABlack is used as the connector on a mobile home certified stove the clearance is determined by the installation instructions for the specific stove model being installed.

Construction
Flue: .016" stainless steel.
Casing: .019" satin coat steel. Satin coat is specifically designed to be painted.
Seam: Interior and exterior seams are seam welded.
Wall thickness: Approximately 3/8"
Paint: Forrest “Stove Bright” flat black

Designed to increase the diameter of a system to accommodate a range of flue sizes, appliances and installations.
Note:  Increasing chimney diameter can reduce draft and increase creosote formation.  Be careful to use these components only when appropriate.

*Special Order.  No returns on special order items.*