This video shows you how to properly install the Hilti CP 643 N and CP 644 US according to UL approval.
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Hilti CP 643 N is an ETAG, BS and UL compliant, and FM approved retrofit firestop collar to help create a fire and smoke barrier around existing pipe penetrations. It's designed to simplify firestopping of combustible pipes through fire-rated walls and floors. The CP 644 US is a retrofit firestop collar with a galvanized steel housing for 8" and 10" pipes. Its latch mechanism allows a quick and easy closure, it can also be uninstalled.

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