urethane/lron wheel with double bearings

1. Horn: Double ball raceways design, zinc plated.
2. Wheel: Orange Urethane (90A~95A) / silvery color thread guards (double ball bearings).
3. Suggest to use for most environment. Especially in factory schlepping, material handling, restaurant. Temperature range: -35℃~80℃
4. Load Capacity: 4":290KG,  5":385KG,  6":440KG,  8":505KG