These wood poles are pre-painted, depicting weather-stained, pressure treated wood. The cross arms and transformers are cast in metal. Use Duro Brand CA glue for attaching the arms and transformers. Extra transformers, cross arms, and poles can be purchased separately. See our EZ Line wiring (5 poles per pack/2 transformers and 5 cross arms) Within a U.S. urban landscape, utility poles tend to be spaced 125 feet apart (approx. 9" in N Scale). In rural areas, utility poles are spaced as much as 300 feet apart (approx. 22" in N Scale). Many factors affect the spacing of the poles. In areas of rough terrain, poles may be spaced either significantly closer to each other or significantly further from each other in order to minimize the chance of damage to the pole.