STI's 18 in. x 6 in. EZ Path® Cable Tray Retrofit Device is designed for applications where conventional firestop installation would be difficult because an existing cable tray cannot be easily disconnected or removed. The retrofit assembly installs around the cable tray and provides a re-enterable pathway that accommodates future cable additions, removals, and changes. Its firestop design helps maintain the integrity of rated wall and floor assemblies while simplifying work around established cable infrastructure. The device is particularly suited to renovation and retrofit projects where minimizing downtime and avoiding major modifications to existing telecommunications and electrical systems are important considerations.