●Races:Cr Mo ●Balls:Si3N4 Silicon Nitride (HRC 75-89) ●Retainer:Nylon ●Sealing:Rubber LLB (non-contact) ●Grease:Multemp PS2 (Kyodo Yushi) ●Tolerance:ABEC-5 ●Quantity of balls:16 pcs ●Dimension of balls:3.175(1/8)mm ●Basic dynamic load rating:4.300 k N ●Basic static load rating:2.940 k N