Optional Flue Extensions For 10' Ceiling Applications Are Available For Use In Ducted Applications; For Use With Wtt32I48Sb Chimney Hood. (Ul)(Li)Seamless Construction(/Li)(Li)Designed For Ducted Applications Unless Specifically Noted(/Li)(Li)Hood Matching Finishes(/Li)(Li)Simply Replaces Upper Section Of Standard Flue Extension That Comes With Hood(/Li)(/Ul)