... rollers,cylindrical rollers with flat ends,sharp ends and round ends. For all kinds of bearings and u-joints ... bearing needle rollerName:PIN Needle Rollers size:3x23.8Material standard: GCr 15Hardness standard ... : HRC58-65Grade:G1,G2,G3End surface shape: round, flatSurface finishing: polish-grind,superfinish grinding Needle roller,cylindrical ...