density steel ball bearing1. able to carry high loads 2. with chrome steel ball bearing 3. with a high load-bearing capacity4. more quietly than metal roller bearings5. low noise, stable performance and durable 6. able to work in sub-zero temperatures and have a low rolling resistance7. suitable for countless applications: sliding doors, windows, and other furniture.Click more: www.xzbearings.com/en/density-steel-ball-bearing-129.html
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