Most of my Colombian females out grow a 41 by 18-24 months.... I keep bigger boas in 4ft ers..... I am working on getting some more caging for the grow up stuff to go in by the first of the year, i am debating on 3ft cages for the smaller locals, but 4ft ers are easier to come by... So I say Deffinatly no on a 41..... there are some ars racks that would house adult boas, but caging will be simmilar priced......