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This wire helix product features steel wire support with a multi-ply design of metalized polyester and aluminum/polyester laminate. It is UL® 181 listed and labeled as a Class 1 Air Connector.
UL® 181, Class 1 air connector labelMulti-ply design of metalized polyester and aluminum/polyester laminateSteel wire support3″ dia. has ¾” pitch4–12″ dia. has 1″ pitchUL® sticker every 10 feetMaximum velocity rating 5000 fpm
Basic Dust & Lint Reduction Pleated Furnace Filter, 14x20x1-In.
BestAir Standard Pleated Air Filter MERV 8
HY-C Shelter® L-Series Stove Boards NON UL-RATED
4 x 14-Inch Brown Stampaire Steel Diffuser
12 x 12-Inch White Sidewall Return Air Grille
