Zoraver Estate offers Copper Based Alloy Self Lubricating Oil Less Bushes. Zoraver Estate supplies superior and economical non-ferrous anti-friction bush & bush bearings alloys and their components. Copper Based Alloy Self Lubricating Oil Less Bushes is a material where in a special high tensile strength copper based alloy is used as the base material. Copper Based Alloy Self Lubricating Oil Less Bushes are inserts of a solid lubricant - graphite. These components can be used where operating temperatures are high and where corrosion resistance is required. It is available in the grade of Grade ZA#500.