we produce and supply high quality deep groove ball bearings very fast deliver time Features :Shield / closure: open ball bearing, Z, ZZ, RS, 2RS,2RZBall bearings ... , AISI440C, AISI304, AISI316, ceramicRetainer: PTFE, nylon, PEEK or stainless steelHardness for rings and balls: 59 - 63HRCBall bearings bore size: 1 - 200mm Deep groove ball bearing