This products is suitable for kinds of vessels whose working medium is water .when the axial vibration<=1mm,the SM type can be used; When the axial vibration <=+-3mm and the speed is high,the SMB type Diameter of the shaft liner:Φ70-Φ850mm Linear velocity of the stern shaft liner:<=9m/s Lubricating water working preddure:<=0.2Mpa Average leakage amount:0.81/H