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 FF Ceiling Ventilators Description Description S&P model 643 wall cap. Aluminum natural finish, built in backdraft damper. For 8″ round duct. Related Related products 983L-S&P in-line adapter. 8″ X 12″ duct intake (FF900/1500). Read more Add To Quote Request This product is already in quote request list View Your Quote Cart FF150-S&P 150 CFM ceiling mounted ventilator. 120 VAC. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart 613-S&P model 613 wall cap. Aluminum natural finish. Built in backdraft damper and birdscreen. For 12″ round duct. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart FF400-S&P 400 CFM ceiling mounted ventilator. 120 VAC. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart Related