... of bearing and packaging 2.competitive price 3.ISO9001:2000 NK 30/20 needle roller bearing Details: Shield / closure: Open ball ... , AISI440C, AISI304, AISI316 Retainer: PTFE, nylon, PEEK or (stainless)steel NK 30/20 needle roller bearing Specifications: Needle rollers bearing can ... with inner ring and without inner ring. G2 needle rollers. NK 30/20 needle roller bearing