We are specially supply Koyo 6840 bearing with the famous brand . Koyo 6840 bearing is mainly used in industrial and auto field. We make test 100% before the delivery to our clients. With the purpose to service our client all-around, we not only provide the products, also provide the technical service, delivery service, payment service, etc. Communicate with our clients timely to provide a suitable solution. Pursue excelsior quality and service is the final target for the people who work in tengda bearings.if there is any more question on bearing Koyo 6840 welcome to contact with the technical consultant in tengda bearings company. sells@tengdabearings.com