... .Experience: We have more than 10 years experience of conveyor idler rollers manufacture, and we did not receive any complaint for our ... " 3.Third party certification: BV/SGS/MA/ISO/CE4.Management system: ISO9001:2008, ISO14001:2004,GB/T2800 Production Capacity:Material: Roller ... SKF, NSK, HRC, LYC,ZWZ brand and the sealing type have ZZ, 2RS, RS and so on . Bearing & Sealing Press:Both end pressing ...