The A220 Plain Ends is a Class 0 Duct used as supply, return or exhaust. It solves the need for a stronger than average semi rigid general purpose venting duct.

Designed for low and medium operating pressures
Same construction as the V320, but with plain ends
Made of non-combustible corrugated aluminum
Ships compressed to 24

3 x 10 and 4 x 10 are now available as A-Seam with unique compression that takes less space: