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 V104-S&P vibration hanger FFC2000 and FFC3500 (1 box). Read more Add To Quote Request This product is already in quote request list View Your Quote Cart 636-S&P model 636 sloped roof cap. For 3″ or 4″ round duct, backdraft damper and birdscreen. Steel, black epoxy. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart FFC100-S&P 100 CFM inline cabinet fan. 120 VAC. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart FFC500-S&P 500 CFM inline cabinet fan. 120 VAC. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart Related