... service life 3, high load carrying capacity 4, material:Gcr15-China 5, O 1,With one or two sides metal shields ... size rang and colorful combination of structure, they are suitable for tractors, motors, automobiles, motorcycles, and other common machinery, as a ... 61829 61830 61831 61832 61833 61834 61835 61836 61837 61838 china made deep groove ball bearing