Galvanized Carbon Steel Material: The ball caster is made of sturdy galvanized carbon steel, which is harder than stainless steel rollers, has a higher load capacity, and has a longer service life. Our ball bearing units can arbitrarily set the distribution density of universal balls according to different load requirements and can be adjusted at will, which is more convenient. Quiet Transportation: The heavy-duty ball caster is precisely ground and polished, the surface is very smooth, the rolling speed is fast, the stability is good, and it is wear-resistant, so it runs smoothly and quietly. In the transportation process, it can greatly improve work efficiency and save working time. Suitable for industrial transportation: Due to the flexible rolling of the ball caster, the work board, material box and other objects circulating on it can slide very flexibly, thus greatly reducing the labor intensity of workers, so it is very suitable for industrial packaging and transportation. For example, airport baggage transportation, factory freight transportation, parcel express delivery, etc. Wide range of uses: This transfer ball bearing can not only be used in various transportation routes, but also widely used in transmission systems, power systems, processing and packaging machinery and auxiliary machinery. Can also be used in a variety of non-industrial applications, including retail store displays. Note: The data are all manually measured, please allow 1-3cm error. Due to differences in light and display, there may be some color differences, please refer to the actual item received.