A 16" x 28" one-part composite system comprised of four components, used for shielding cable trays and conduit, HVAC ductwork and vital process equipment from radiant heat, flame spread and smoke. Ideal for fire-stopping blank openings and through-penetrations of multiple cable, pipe ducts, buss ducts and cable trays. Intumescent. Lightweight and easy to handle - just cut and form to fit. Easy to install using common trade tools. Easy to fasten - b