Hi Laura, please stick to a single thread with a single question like this

(ideally stick to one thread per kart! that way we can reference more easily

)
Now, 32splines is not telling I'm afraid..
as anderkart already said, there are plenty sizes around, imperial and metric
and it's impossible for us to tell which one you'll need.
measure the shaft diameter (try both.. metric and imperial)
post a pic of your kart and tell us mabout the make and model as best as you can,
the more info we have, the easier it'll be for us to tell you what you need and where to find it.
'sid