3M B258 Fire Barrier Block 2-3/8-Inch x 5-1/8-Inch x 7-7/8-Inch Maroon
SKU: 493901
Description
Our 3M™ Fire Barrier Block B258 is a pre-formed foam block designed for easy installation to effectively seal larger openings against smoke, toxic gas and flame. It is simple to use and helps reduce sound transmission.