Hi guys, Welcome to the Advanced Video Search Engine, and you are watching HOW TO install Hilti CFS-BL firestop blocks for cable tray penetrations - UL. That video is uploaded by Hilti Group at 2019-04-18T02:08:53-07:00. We are promoting this video only for entertainment and educational purpose only. So, I hope you like & enjoy it. [0wDMecqP27c]