Orbit's FireBlok™ Universal Firestop Insert Gaskets replace 2-hour firestop putty pads and fit most 1-Gang, 4" Square, or 4-11/16" boxes. With peel-off adhesive, a raised ground opening, and intumescent plastic that won’t expire, UFSI will not stick together in transit. Doubles as a 52 STC sound pad. Ideal for prefab, Orbit offers pre-assembly with UFSI, box, grounding, and adapter. ETL Classified.
