... Accessories Oil-Free Flange alloy cast iron Guide Bushings-A2.Material: Alloy cast iron +Graphite3.Grinding Precision:+/-0.002mmself ... industry, such as casting machine, mining machinery, shipping, steam turbine, etc.3.Features:1. Without pre-lubrication required2. ... . JUNSHUO, we specialize in manufacturing auto mould component and press die component. Main Product: guide pillar/ gudie bush/ ...