Nylon-Insulated, WR: 22 - 18, Color: Red, 100/PK

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.