Through Pentration Threaded Firestop Sleeve Kit 1 inch diameter, Unique Fire Stop Products, Mfr#: TF-1

The UNIQUE Threaded Firestop Sleeve is used for new cable installations through sheet rock, cinder block, cement, masonry firewalls or 3 in. slab floor.UL Classified for up to 4 hours horizontal and 3 hours vertical. UNIQUE’s Threaded Firestop Sleeve is our most robust system. All UNIQUE firestop sleeve systems systems include everything needed to install and seal. All of UNIQUE fire stop sleeves come with Intumescent Putty for a minimum 25% cable load.