... maintenance. 2. Characteristic1).Patent product 2).The supporting part of lever is used billard bearing structure3).High sensitivity, convenient operation, precise ... : 0.01mm3).specification: 3.6m, 5.4m4. Apparatus set:Front lever,Back lever,Apparatus seatDial gauge bracket,Measuring polingMeasuring head: 50mm, 100mm, 150mm ...