3M™ Fire Barrier Square Pass-Through Triple Mounting Brackets, PT4TMB, pair, 4 in by 3M

Used in conjunction with three 4 inch square 3M™ Fire Barrier Pass-Through Devices, the 4 inch x 12 inch 3M™ Fire Barrier Pass-Through Triple Mounting Brackets PT4TMB provide additional support to the device when installing three devices stacked (vertically or horizontally) together in a 1 x 3 array.3M Fire Barrier Pass-Through Triple Mounting Brackets PT4TMB come with a pair of brackets (includes bracketing screws) for mounting on both sides of an assembly. 3M Fire Barrier Pass-Through Devices use a unique fixed fire-rated intumescent material which works in conjunction with a foam smoke seal and optional mounting brackets. In the event of a fire, intumescent material quickly expands to seal the inside of the device, helping to prevent the spread of smoke and fire into other compartments. Optional mounting brackets and additional foam smoke seal replacements (device comes with 2 foam seals) sold separately. Square devices can be stacked in multiple device configurations for larger cable management and firestop requirements.