https://www.hilti.com/c/CLS_FIRESTOP_PROTECTION_7131/CLS_FIRESTOP_DEVICES_SLEEVES_7131/r7881374
CFS-SL GA Extended Speed Sleeve - Firestop devices and sleeves - Hilti USA
Pathway device for high-traffic cabling with optimal airflow control
firestop devicescfsslgaextended
https://www.hilti.ie/c/CLS_FIRESTOP_PROTECTION_7131/CLS_FIRESTOP_DEVICES_SLEEVES_7131/r7881374?activeTab=preconfigured-kits-tabs
CFS-SL GA Extended Speed Sleeve - Firestop devices and sleeves - Hilti Ireland
Pathway device for high-traffic cabling with optimal airflow control
firestop devicescfsslgaextended