cylindrical roller bearing 1)Our production have passed the certifacte of ISO9001-2000 2)Material:Gcr15,Gcr15SiMn,G20Gr2Ni4A,Gcr18M0 3)precise:P0,P5,P6... 4)Type:NU NF NUP N NJ NH FC FCD FCDP,BNBA,MCB.........5)Series:18,28,38,19,29,30,11,31,(0)2,22,32,23,39,49,40,50,31 Series.........6)size:the ID is above 100mm
