This is the 3-1/2" to 5-1/2" Blue Needle Trees from the Woodland Scenics® Woodland Classics Series

The electric switch machine sits invisibly inside the molded gray roadbed

outside detailed tracks

Keeps the engine solidly mounted

6mm washers

Robinson Racing 1544 Heavy Duty Competition Output Gear Hard Shaft Axial SCX10 Inferno MP7.5 Parts This is the 3-1/2" toRobinson Racing 1544 Heavy Duty Competition Output Gear Hard Shaft Axial SCX10 The Robinson Racing 1544 is a heavy duty competition output gear built with a hardened shaft for the Axial SCX10. It's designed as a durable, reliable upgrade over the stock output gear for demanding competition use. The hard shaft construction adds strength where the stock output gear can be prone to wear, giving SCX10 owners a more competition ready drivetrain component.