polypropylene wheel with double ball bearings

1. Horn: Double ball raceways design, bright zinc plated.
2. Wheel: Milk-white color Polyolefin(65D)/ No thread guards (double ball bearings)
3. Suggest to use for many environmens application, like industry, material  handling. Temperature range: -15℃~80℃
4. Load Capacity: 3":122KG,  4":140KG,  5":155KG