One is an older Hydromotive O\T 28 pitch with the pressed in 15 spline (small shaft) hub. Its flawless.
Asking $425.00 TYD
Other is also a Hydromotive X O/T 27 pitch, its diameter has been reduced to 14 1/8, it has the square bore so that any propshaft can be used. it does not run like a 27 on...