3M 7000133839

3M 3M Fire Barrier Cast-In Device Height Adaptors are 1-piece extensions that provide up to 4 of additional height to 3M Fire Barrier Cast-In Devices. No fasteners are required and installers simply snap the adaptor onto a metallic or non-metallic Cast-In Device. Adaptors adjust to accommodate concrete slab pour depths up to 12 thick. Adaptor/device assemblies are firestop tested up to 3 hours.