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 FFC250-S&P 250 CFM inline cabinet fan. 120 VAC. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart FFC400-S&P 400 CFM inline cabinet fan. 120 VAC. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart V102-S&P vibration isolators FF100-1500 (one bag). Read more Add To Quote Request This product is already in quote request list View Your Quote Cart 641-S&P model 641 wall cap. Aluminum natural finish. Built in backdraft damper and birdscreen. For 6″ round duct. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart Related