... We adopts labyrinth sealing to prevent the corrosion of the impurity, the water and the air effectively ... concentric . Shaft Flat Milling:The import dimension of the roller is the flat distance, we use the four ... 100% qualified. Roller Sealing:Our roller Sealing have 3 type , Including TK , TKII, DTII . All the sealing ... , NSK, HRC, LYC,ZWZ brand and the sealing type have ZZ, 2RS, RS and so on . Bearing ...