uncycle rail seat post vs bike seat post

is there any diffrence between a unciycle rail seat post and a bike rail seat post just im runnig a bit low on funds and was wondering if there was any diffrence and saving me 13£ jsut wanted to know if anyone knows

There’s no such thing as a unicycle rail seat post; we just use bike seatposts. Anything from a bike store should work, though you might want to check the angles the seat is capable of reaching, as we tend to like our seats more angled than bicyclists do.