... Seal material: Rubber,Ferrum Noise: Z1,Z2,Z3 Vibration: V1,V2,V3 Spherical plain bearing Marterial: Gcr15Seal material: Rubber,FerrumNoise ... : Z1,Z2,Z3Vibration: V1,V2,V3Clearance: C2,C3,C4Bore diameter 6~60mm69 series : 6900, 6901, 6902, 6903, 6904, 6905, 6906, 6907, 6908 ...