643-S&P model 643 wall cap. Aluminum natural finish, built in backdraft damper. For 8″ round duct. December 20, 2019 | No Comments 643-S&P model 643 wall cap. Aluminum natural finish, built in backdraft damper. For 8″ round duct. Add To Quote Request This product is already in quote request list View Your Quote Cart SKU: AAIS-SP-643-S&P model 643 wall cap. Aluminum natural finish, built in backdraft damper. For 8" round duct. Category: S&P FFC Inline/Cabinet Ventilators Description Description S&P model 643 wall cap. Aluminum natural finish, built in backdraft damper. For 8″ round duct. Related Related products FFC300-S&P 300 CFM inline cabinet fan. 120 VAC. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart FFC900-S&P 900 CFM inline cabinet fan. 120 VAC. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart 642-S&P model 642 wall cap. Aluminum natural finish, built in backdraft damper. For 3″ or 4″ round duct. 4″ to 3″ transition included. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart G102-S&P white enamel painted steel grille. Mounting screws included. (FFC2000) Read more Add To Quote Request This product is already in quote request list View Your Quote Cart Related