polyurethane wheel with Double bearings

1. Horn: Double ball raceways design, black color painted .
2. Wheel: Orange Polyurethane (90A~95A) / double ball bearings.
3. Suggest to usr for many field with different environment.
    Like workshops, warehouses, manufacturing and restaurant.
    Temperature range: -35℃~80℃4.
4. Load Capacity: 3":133KG,  4":170KG,  5":205KG,  6":235KG