- Aluminum foil vapor barrier
- Concealed hinges and latches
- For use with R6 insulated 1" fiberglass plenum to accept 6" to 18" round collars
- Requires standard 20" x 20" x 1" filter
- Stamped face has fins on 1/2" centers
- WARNING - California Prop 65: This product may contain chemicals known to the State of California to cause cancer, birth defects or other reproductive harm. Wash hands after handling.