Fully assembled for quick and easy installation.
 Static, no moving parts.
 Stops chimney downdrafts.
 Stops debris and bird mess.
 Stainless Steel caps will not rust for a lifetime.
 All Purpose model for use with coal, coke, wood, gas and oil.
 30-day money-back guarantee.
 Superb in quality and design.
 Comes with a free 1" spark screen.
 For vertical installations only.
Lifetime warranty.

Installation: This product comes fully assembled. No drilling or gluing. Just set it on top of your chimney and tighten three bolts on each side of the transition.

Click the size you measured.