6in x 12in Single Wall Black Stove Pipe Our Single Wall Black Stove Pipe is .030 cold-rolled, 22 gauge steel Superior pipe on the market due to it's thickness; 60% thicker than most brands 100% Laser Advanced Resistance Welded Seams creates a round pipe to pipe fit every time Installation support before and after the sale; we're here to help you do it yourself Use Single Wall Chimney Stove Pipe when there's a minimum 18 clearance to combustibles