The 3M™ Fire Barrier Pass-Through Device is a one-piece hinged metal enclosure designed to prevent the passage of fire and smoke. The metal device has a fixed fire stopping in tumescent material which works in conjunction with foam smoke seals and an optional mounting bracket. It has been contractor-designed to allow for use in either retrofit or new construction applications where an "install and be done" technology is needed. It is designed to provide years of dependable through-penetration fire stopping with no reapplication of additional product to maintain its rating. The 3M Fire Barrier Pass-Through Device achieved up to 3 hour fire ratings (dependent upon system application) when tested by Underwriter Laboratories Inc. in accordance with ASTM E814 (UL1479).