18" All Track Suspension Kit White Finish - Stem kit includes track bracket, rod and ceiling canopy - Canopy covers a 4" octagon box and permits power wiring through the rod - SK18/24/36/48 - Use two suspension kits for 2' and 4' tracks, three kits for 6' and 8' track sections - For power to 2-wire systems, add a live end (LLE), flexible connector (LFLX), or straight line power connector (LI-PWR). For power to 3-wire (H-system_ or wide 2-wire systems (J-System), connect with HLE or JLE, HI-PWR or JI-PWR, HFLX or JFLX