3MFire Barrier Duct Wrap 20A

3M(TM) Fire Barrier Duct Wrap 20A 2 in x 24 in A 2" thick x 24" wide fire resistant wrap consisting of a patented inorganic blanket encapsulated with a scrim-reinforced foil. Used to fire rate commercial kitchen grease ducts and is a proven alternative to 1 or 2 hour fire resistant rated shaft enclosures.