American Monorail Bridge Crane Hoist Trolley Manual End Truck 6-1/2" Wheels

In good used condition.  
Fits 3" to 4" beam flange width.
6-1/2" wheel dia.   
23" Overall length.
Includes bottom hanger plate but no hardware.  Plate is 15"x 6-7/8"W.  Fits 4-3/4" beam width.