... .4. Color: Black, red and grey.5. Professional roller production line.6. Professional designing and inspection team.7. Bearing, bearing housing and sealing ... , Including TK , TKII, DTII . All the sealing use double labyrinth nylon sealing. The bearing use SKF, NSK, HRC, LYC,ZWZ brand and ... disc return idler roller,self cleaning idler roller,comb roller,ball bearing rubber idler roller