ULTRABlack is designed to be used as a connector between a freestanding oil, wood or coal burning stove and a masonry or metal chimney. There are four primary advantages to ULTRABlack over single wall connector pipes:

It offers reduced clearance to combustible materials

It is designed to last the lifetime of the stove and/or chimney system

It offers reduced creosote formation

It is certified for use with mobile home stove

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

Connect ULTRABlack to a masonry chimney with an existing 8" thimble. 
Note:  ULTRABlack is not certified to pass through a combustible wall.  An EXCELiner Insulated Thimble (ITH) must be used where there is a combustible wall between the stove and the masonry chimney.