423-S&P galvanized steel round transition. 4.5 X 18.5 to 10″ round. December 20, 2019 | No Comments 423-S&P galvanized steel round transition. 4.5 X 18.5 to 10″ round. Add To Quote Request This product is already in quote request list View Your Quote Cart SKU: AAIS-SP-423-S&P galvanized steel round transition. 4.5 X 18.5 to 10" round. Category: S&P FFC Inline/Cabinet Ventilators Description Description S&P galvanized steel round transition. 4.5 X 18.5 to 10″ round. Related Related products 643-S&P model 643 wall cap. Aluminum natural finish, built in backdraft damper. For 8″ round duct. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart 634-S&P model 634 roof cap. For 3 1/4 X 10″ or up to 8″ round duct, built in backdraft damper and birdscreen, baked enamel. Read more Add To Quote Request This product is already in quote request list View Your Quote Cart 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 FFC200-S&P 200 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