Slide rail ball bearing Nylon or steel cage Super types available ... certified Third party preshipment inspect linear motion ball bearing and slide rail ball bearingRange of production:- Series LM, LME, LMB, ... L, LMEKM-L, LMBKM-L, LMHM-LLinear motion ball bearing slide units- Series SC, SCE, SC-L, SCE-L, ... industry, medical appliance, printing instrument etc.Packing:Work house: slide rail ball bearing