Parts 23 and 24 are outside the wheel on the left, parts 11 and 12 on the right. These are both spacers (23 and 11) with a tin dust or dirt shield pressed on. They are shown as 2 separate parts on the diagram but will come out of the wheel as one. The disc brake caliper carrier acts as an additional spacer on the right and fits between 11 and 13. 8 and 10 are grease seals over the bearings and the spacers fit into them.