The Selkirk SPR6WTB is a Wall Thimble/Brass Trim, 6" from the Selkirk chimney and venting line. Wall thimble that carries the chimney through a combustible wall at the required clearance, with brass trim on the room side.
Selkirk factory built chimney and stove pipe components are listed systems for wood, oil, and gas appliances. Insulated A-V sections and their supports, shields, and terminations are designed to work together, so use matching Selkirk parts throughout the run to keep the listing and clearances valid. Check the pipe size and type on your job before ordering so the fitting matches.
Rural Energy stocks Selkirk factory built chimney components along with the heating equipment they serve, and ships to dealers, contractors, and homeowners.