Hart & Cooley 8" x 8' (96") Flexible Aluminum Corrugated Air Duct Connector AlumiFlex F040CP Series (# 055699) 8" x 8' (compressed to 26" in length for ease of installation & shipping convenience) Sturdy corrugated aluminum construction; Class 0 air connector One end crimped to allow for easy installation in a variety of applications GREENGUARD Level 4 highly microbial resistant Install confidence with the trusted Hart & Cooley name