Brushes For Starter

I have been looking for starter brushes for my 2011 EZ GO TXT gas golf cart and I'm having a hard time finding some. The only one I found is on eBay for $17.75 and I don't know if it will fit on my starter. It looks like mine that I took off the other day and put back on. On eBay it says Fits the following Starters/Generators EZ-GO 25533-G01
EZ-GO 26993-G01
EZ-GO 27065-G01
What is the the first set and second set of numbers mean?