TRACK/18 STEM KIT/WH. Mounts to a 4″ or 3″ octagon outlet box. Use two per 2′ and 4′ track, three per 8′ and 12′ track. When making a run of track do not exceed 4′ between stems. Use additional stems for additional support. Power is fed to the track with the stem closest to the track feed-in point. For power feed to Feed Track and Live End, “L”, “T”, “X”, In-line, and Variable Angle Connectors.