Four 12mm hex adapters

Rear fitment

5mm Ball Bearings

and is properly configured or calibrated for the higher LiPo operating voltage

Kato 20-063 N Scale Unitrack Concrete Illuminated Bumper Track Type A Blitz Parts Four 12mm hex adaptersKato 20 063 N Scale Unitrack Concrete Illuminated Bumper Track Type A Product Information The Kato Concrete Illuminated Bumper Track operates off of track power and requires zero wiring just attach to the end of your spur and it's ready to go. This bumper is ideal for modelers who are operating stub end spur tracks and switching yards and want to be able to tell at a glance if a track is live or not. The Concrete Illuminated Bumper Track is 100%