COMPASS Polisher covers 2pcs

So I am polishing, polishing away and suddenly it stops working. What do I do? I have to change the sleeve on my 240mm diameter disc polisher, because the old one is spent. I do not want to just buy the cheapest replacements, so I buy a set of two Compass sleeves, because I have already tried them, they fit perfectly and they fit my needs. I simply click, order, attach and polish.