This is a PRR K braced 2 track catenary structure with signal lines, grab irons & rain caps 2- PHASE Transmission brackets in HO scale. Insulators have holes at the ends for catenary/transmission wire connections This a Mainline/Highline Type structure for an interlocking with intermediate insulators, cross feeder supports and interlocking lights. This structure is for 2",2-1/4" & 2-1/2" track centers ONLY