A scaled-down tractor seat top with firm seating surface and corkscrew height adjustment make the 5120 a go-to throne option.
[20" min / 27" max height]
Tractor Style Full-Size Molded Seat Top provides ergonomic comfort.  Solid Ear Casting with Oversize Locking Nut and Swivel Height Adjustment (5120 allows 20" to 27" seat height)  1 1/8" full-size Double-Braced Base