Rotovap flask size help

What size boiling flask can I use for the Bochi rotary evaporator r levels 65/40?

Could I use a 5L?

Found that model as s used rotovap with glass and stands currently trying to piece the rest together

Not sure if this helps, but there's a lot of scientific glassware here for evaporation, probably one is the one you need.

If you haven't already purchased the Buchi, they also carry rotovaps too.

I bought a few things from them and they were friendly, so maybe if you just call them they can help.