input: [ITEM] Train Truck HO -Kato Barber s-2 roller bearing trucks# 31-602 [WHO MAKES IT] Kato [WHERE TO GET IT] Local hobby store Or www.katousa.com (link is not working at this time - go to site and you'll find it) [WHAT IT IS USED FOR] 
output: Main road wheels on each car of train - you need ONE of these for each car - they are sold in pairs