Features fully unitized, twist-lock construction in 3” and 4”
diameters. 
Listed at 1” clearance to combustibles in the USA
and Canada. It can be used 
in both vertical and horizontal
installations. Stainless steel welded seam 
inner wall, combined
with a galvalume welded seam outer wall. Pipe OD is 
diameter
plus 5⁄8”. Galvalume or painted black outer finish. 6” 
length