Typical required components:

Part #     Description

9484       6" Deluxe Rain Cap

9449        6" Flashing 0/12 to 6/12 Pitch

or

9450         6" Flashing 7/12 to 12/12 Pitch

9359         6" Storm Collar

9438B      6" Square Cathedral Support

6689         6" Stove pipe Adapter ( for single wall pipe only). 

or 

8674     6" Stove pipe Adapter (for double wall interior stove pipe).

These are the components for a typical cathedral installations, just add chimney lengths and interior pipe.