Stack hats keep out water, weather and soot. Made from high-quality polymer. Safe and easy to install and remove. Dual kit includes two stack hats and  extension pole.  No moving parts. Fits 6" stacks. 12-1/2"L. One hat is 6-1/2" dia., the other is 6-3/4" diameter. Hats stack inside one another for more compact storage.
Available in red, blue, or black.
Sold as a dual stack kit.

NOTE: Does not fit Peterbilt and Freightliner OEM curved top stacks. Will fit aftermarket curved top stacks.