This is a short 3-1/2" long piece of pipe with a 1" crimp for connecting on one side, and holding a manual damper.
This manual damper can be used in very long chimneys to reduce the draft on the solid fuel heaters and the diesel heaters.
Made of 304 stainless steel.
This product can expose you to chemicals which are known to the State of California to cause cancer, birth defects or other reproductive harm.
www.P65Warnings.ca.gov