https://www.ebay.com/sch/i.html?_nkw=3M+Gray+Red+Fire+Barrier+Wrap+Strip+Pack+Of+24&_sacat=0&_dmd=2

3M Gray/Red Fire Barrier Wrap Strip, Pack Of 24

Regular price
$266.00
Sale price
$185.00

Firestop Wrap Strip, Height 3/16 In, Width 2-1/2 In, Length 11-1/2 In, Composite Sheet, Concrete Wall, Gypsum Wall, Up to 3 hr. Fire Rating, Gray/Red, Standards UL Classified, Fire Barrier Wrap Strip, Package Quantity 24