This bush is fitted in the alloy Brake Plate Steady Housing used on Girling brake plates and is not shown in the exploded views. Oilite bush's are already impregnated with oil from new and have an advantage over the normal bronze bushes when used in the poorly lubricated Isetta suspension set up, however, to ensure this impregnation it is suggested these bushes may benefit from being  immersed in new engine oil overnight before installation