Structure Cylindrical Type Roller Brand Name WZA Bore Size 50 mm Outside Diameter 110 mm Model Number 32310 Precision Rating p0, p6, p5, p4, p3, p2 Seals Type zz, 2rs Number of Row Single Row Place of Origin China (Mainland) Clearance C2, C3, C4, C5 Vibration V1-V4 Noise level Z1-Z4 Quality standard ISO9001:2000 Main market America, Africa, Asia, Europe Payment terms TT30% in advance , 70% paid against the copy BL Speed ratings reference speed