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