Single, double contact seals RS1, 2RS1. The bearings are suitable for low speed use, at the time of manufacture is mounted in the right amount of grease, the installation does not need cleaning, installing grease. Grease has a rust-proof and sealing. The bearings can be used for all kinds of machinery, especially suitable for the poor, bearing its own seal on the environment. Grease filled bearing size and condition of use, and typically bearing the internal space of 25%~35%.