... 5.good price Specifications:Specifications:1) Sliding contact surfaces: Steel vs. Steel.2) Materials: Both outer race and inner race are ... made of high chrome bearing steel.3) Heat treatment: Both outer race and inner ... Seals TypeOpen,Z,ZZ,RS,2RSMaterialRing Material Chrome Steel ,Carbon steel,Stainless steelCage materialNylon ,steel , brassClearanceC0,C2,C3,C4,C5VibrationZv1,Zv2 ...